Table of Contents
Reproduction in Plants- Worksheets
These worksheets are related to the chapter on “Reproduction in Plants.” The chapter covers different methods plants use to reproduce, including both asexual and sexual reproduction. The worksheets provided include both solved and unsolved versions to aid in learning.
Key concepts covered in the chapter and explored through these worksheets include-
- Asexual Reproduction- Understanding how plants can reproduce without seeds, through methods like budding, fragmentation, and vegetative propagation.
- Sexual Reproduction- Learning about the process involving male and female gametes, pollination, fertilisation, and seed formation.
- Seed Dispersal- Studying the different ways seeds spread to new locations.
The solved worksheets offer solutions and methods to approach these topics, while the unsolved worksheets allow for practice and self-assessment.
Also Check – Rapid Revision – Class 7 Science- Chapter 12 – Reproduction in Plants
Worksheet 1 – Chapter 8 – Reproduction in Plants – Student Worksheet (Unsolved)
Fill in the blanks-
(a) In plants, __________ reproduction involves the fusion of male and female gametes.
(b) Asexual reproduction in plants can occur through __________, __________, and __________.
(c) The male reproductive part of a flower is the __________, consisting of __________ and __________.
(d) The female reproductive part of a flower is the __________, composed of __________, __________, and __________.
(e) __________ is the process where pollen grains are transferred from the anther to the stigma of a flower.
True or False-
(a) Seed dispersal is essential for preventing overcrowding around parent plants. (T/F)
(b) All plants reproduce sexually. (T/F)
(c) Fertilisation in plants occurs when the male gamete fuses with the egg cell in the ovule. (T/F)
(d) Vegetative propagation always requires seeds. (T/F)
Match the following reproductive methods with their respective examples-
(a) Budding
(b) Fragmentation
(c) Spore Formation
(d) Vegetative Propagation
Examples-
(i) Bryophyllum (leaf propagation)
(ii) Yeast
(iii) Bread Mold
(iv) Spirogyra
Describe the process and importance of pollination in plants.
Explain the role of fruits in the life cycle of a flowering plant.
Discuss the various methods by which seeds can be dispersed.
Describe the process of germination and the factors that affect it.
How does asexual reproduction in plants differ from sexual reproduction?
Explain the structure and function of different parts of a flower.
Discuss the advantages and disadvantages of vegetative propagation.
Worksheet 1 – Chapter 8 – Reproduction in Plants – Solved Worksheet with Answer
Fill in the blanks-
- (a) In plants, sexual reproduction involves the fusion of male and female gametes.
- (b) Asexual reproduction in plants can occur through budding, fragmentation, and spore formation.
- (c) The male reproductive part of a flower is the stamen, consisting of anther and filament.
- (d) The female reproductive part of a flower is the carpel or pistil, composed of stigma, style, and ovary.
- (e) Pollination is the process where pollen grains are transferred from the anther to the stigma of a flower.
True or False-
- (a) Seed dispersal is essential for preventing overcrowding around parent plants. (T)
- (b) All plants reproduce sexually. (F) – Some plants reproduce asexually.
- (c) Fertilisation in plants occurs when the male gamete fuses with the egg cell in the ovule. (T)
- (d) Vegetative propagation always requires seeds. (F) – It does not involve seeds.
Match the following reproductive methods with their respective examples-
- (a) Budding – (ii) Yeast
- (b) Fragmentation – (iv) Spirogyra
- (c) Spore Formation – (iii) Bread Mold
- (d) Vegetative Propagation – (i) Bryophyllum (leaf propagation)
Describe the process and importance of pollination in plants.
- Pollination is the transfer of pollen from the anther of a flower to the stigma. It’s crucial for sexual reproduction in plants, as it allows for fertilisation, leading to the formation of seeds and fruits, which helps in the continuation of plant species.
Explain the role of fruits in the life cycle of a flowering plant.
- Fruits develop from the ovary after fertilisation. They protect the developing seeds and aid in their dispersal, either through natural agents (wind, water, animals) or human activities, ensuring the spread and survival of the plant species.
Discuss the various methods by which seeds can be dispersed.
- Seeds can be dispersed by various means, including wind, water, animals, and self-dispersal mechanisms (e.g., exploding pods). These methods help in spreading seeds to new locations for germination and growth.
Describe the process of germination and the factors that affect it.
- Germination is the process by which a seed develops into a new plant. Factors affecting germination include water, temperature, light, and oxygen. Water activates enzymes, temperature affects metabolic rates, and light can trigger or inhibit germination in some seeds.
How does asexual reproduction in plants differ from sexual reproduction?
- Asexual reproduction involves a single parent and produces genetically identical offspring. It does not involve gamete formation or fertilisation. In contrast, sexual reproduction involves two parents and the fusion of gametes, producing genetically diverse offspring.
Explain the structure and function of different parts of a flower.
- A flower typically consists of sepals (protect the flower bud), petals (attract pollinators), stamens (male reproductive part; produce pollen), and carpels or pistils (female reproductive part; receive pollen and house ovules).
Discuss the advantages and disadvantages of vegetative propagation.
- Advantages- Faster than seed reproduction, produces identical offspring (maintains desirable traits), can propagate plants that do not produce viable seeds. Disadvantages- Lack of genetic diversity (susceptible to diseases), spread of diseases from parent to offspring, and limited dispersal range.
Also Check – Class 7 Science- Chapter 12 – Reproduction in Plants- (Complete Notes)
Worksheet 2 – Chapter 8 – Reproduction in Plants – Student Worksheet (Unsolved)
Multiple Choice Questions (MCQs)-
(a) Which part of the plant is involved in asexual reproduction?
(i) Flower (ii) Leaf (iii) Root (iv) Stem
(b) What is the primary purpose of flowers in plants?
(i) Photosynthesis (ii) Support (iii) Reproduction (iv) Protection
(c) In which process do plants produce offspring without the fusion of gametes?
(i) Sexual reproduction (ii) Asexual reproduction (iii) Germination (iv) Pollination
Identify whether the following statements are related to Sexual or Asexual reproduction in plants-
(a) Production of new plants from leaves.
(b) Formation of seeds after fertilisation.
(c) Budding in yeast.
(d) Formation of fruit after pollination.
Match the following plant parts with their functions-
(a) Anther
(b) Stigma
(c) Ovary
(d) Pollen
Functions-
(i) Contains male gametes.
(ii) Site of pollen reception.
(iii) Develops into a fruit.
(iv) Produces pollen grains.
Describe the process and significance of seed dispersal in plants.
Explain how vegetative propagation is different from seed-based reproduction.
Discuss the role of pollinators in the reproduction of flowering plants.
How does the environment influence the germination of seeds?
What are the benefits and limitations of asexual reproduction in plants?
Explain the structure of a typical flower and its role in plant reproduction.
Describe the stages of development from a fertilised ovule to a mature seed.
Also Check – Class 7 – Science- Chapter 12 – Reproduction in Plants question answer (Long Question Answer)
Worksheet 2 – Chapter 8 – Reproduction in Plants – Solved Worksheet with Answer
Multiple Choice Questions (MCQs)-
(a) Which part of the plant is involved in asexual reproduction?
Answer- (ii) Leaf
(b) What is the primary purpose of flowers in plants?
Answer- (iii) Reproduction
(c) In which process do plants produce offspring without the fusion of gametes?
Answer- (ii) Asexual reproduction
Identify whether the following statements are related to Sexual or Asexual reproduction in plants-
(a) Production of new plants from leaves.
Answer- Asexual reproduction
(b) Formation of seeds after fertilisation.
Answer- Sexual reproduction
(c) Budding in yeast.
Answer- Asexual reproduction
(d) Formation of fruit after pollination.
Answer- Sexual reproduction
Match the following plant parts with their functions-
(a) Anther – (iv) Produces pollen grains
(b) Stigma – (ii) Site of pollen reception
(c) Ovary – (iii) Develops into a fruit
(d) Pollen – (i) Contains male gametes
Describe the process and significance of seed dispersal in plants.
Seed dispersal is the process by which seeds are spread away from the parent plant to reduce competition for resources. It occurs through various methods like wind, water, animals, and self-dispersion, ensuring the spread of the species and greater chances of survival and germination in new locations.
Explain how vegetative propagation is different from seed-based reproduction.
Vegetative propagation is a form of asexual reproduction where new plants grow from parts of the parent plant (like leaves, stems, roots) without seed formation. It produces genetically identical offspring and is faster than seed-based reproduction, which involves sexual reproduction and genetic variation.
Discuss the role of pollinators in the reproduction of flowering plants.
Pollinators, such as bees, butterflies, and birds, play a crucial role in the sexual reproduction of flowering plants by transferring pollen from one flower to another. This leads to fertilisation and the formation of seeds and fruit, ensuring genetic diversity and the continuation of plant species.
How does the environment influence the germination of seeds?
The germination of seeds is influenced by environmental factors such as water, temperature, light, and soil quality. Adequate moisture activates enzymes, the right temperature optimises metabolic processes, light affects some seeds’ germination, and soil quality provides necessary nutrients.
What are the benefits and limitations of asexual reproduction in plants?
Benefits- Rapid reproduction, no need for pollinators, genetic uniformity ensures preservation of traits. Limitations- Lack of genetic diversity, increased vulnerability to diseases, and environmental changes.
Explain the structure of a typical flower and its role in plant reproduction.
A typical flower consists of sepals, petals, stamens (male reproductive parts with anthers and filaments), and carpels or pistils (female reproductive parts with stigma, style, and ovary). Flowers facilitate sexual reproduction through pollination and fertilisation, leading to seed and fruit formation.
Describe the stages of development from a fertilised ovule to a mature seed.
After fertilisation, the ovule develops into a seed. The zygote forms an embryo, while the ovule’s outer layers form the seed coat. The embryo matures, storing nutrients, and upon reaching maturity, the seed becomes dormant until conditions are favourable for germination.
Also Check – Chapter 12 – Reproduction in Plants–Class 7 science- Question and Answer (Solved MCQs)
Worksheet 3 – Chapter 8 – Reproduction in Plants – Student Worksheet (Unsolved)
Choose the Correct Option-
(a) Which part of the plant typically participates in vegetative propagation?
(i) Flowers (ii) Seeds (iii) Leaves (iv) Fruits
(b) What is the main function of the ovary in a flower?
(i) Produces pollen (ii) Supports the flower (iii) Contains the ovules (iv) Attracts pollinators
(c) Spore formation as a means of reproduction is commonly seen in which type of plants?
(i) Flowering plants (ii) Moss and ferns (iii) Cacti (iv) Fruit trees
Analyse and Categorize-
For each of the following methods, categorise whether they are examples of vegetative propagation or sexual reproduction-
(a) Formation of new plants from roots.
(b) Formation of seeds in fruits.
(c) Growth of new plants from leaf cuttings.
(d) Pollen transferring to stigma.
Match the Column-
Match the following methods of asexual reproduction with their correct examples-
(a) Cutting
(b) Grafting
(c) Budding
(d) Spore formation
Examples-
(i) Yeast
(ii) Roses
(iii) Moss
(iv) Apple trees
Elaborate the Process-
Describe the process of grafting and its significance in plant reproduction.
Explain the Concepts-
Explain how vegetative propagation benefits the growth and cultivation of certain plant species.
Discuss Environmental Impact-
How does the environment affect the process of vegetative propagation?
Advantages and Disadvantages-
List the advantages and disadvantages of asexual reproduction in plants.
Flower Anatomy-
Describe the anatomy of a flower and explain the role of each part in plant reproduction.
Seed Development-
Outline the stages in the development of a seed from fertilisation to maturation.
Practical Application-
Discuss how understanding plant reproduction is beneficial in agriculture and horticulture.
Also Check – Chapter 12 – Reproduction in Plants-–Class 7 science- Question and Answer (Fill in the Blanks)
Worksheet 3 – Chapter 8 – Reproduction in Plants – Solved Worksheet with Answer
Choose the Correct Option-
- (a) Which part of the plant typically participates in vegetative propagation?
- Answer- (iii) Leaves
- (b) What is the main function of the ovary in a flower?
- Answer- (iii) Contains the ovules
- (c) Spore formation as a means of reproduction is commonly seen in which type of plants?
- Answer- (ii) Moss and ferns
Analyse and Categorize-
- (a) Formation of new plants from roots.
- Category- Vegetative Propagation
- (b) Formation of seeds in fruits.
- Category- Sexual Reproduction
- (c) Growth of new plants from leaf cuttings.
- Category- Vegetative Propagation
- (d) Pollen transferring to stigma.
- Category- Sexual Reproduction
Match the Column-
- (a) Cutting – (ii) Roses
- (b) Grafting – (iv) Apple trees
- (c) Budding – (i) Yeast
- (d) Spore formation – (iii) Moss
Elaborate the Process-
- Grafting involves joining the tissues of two plants so they grow as one. It’s significant for combining desirable characteristics of two different plants, such as disease resistance with high yield, and for reproducing plants that don’t root well from cuttings.
Explain the Concepts-
- Vegetative propagation benefits plants by enabling rapid and large-scale reproduction, preserving desirable traits, and bypassing the seed formation stage. It’s particularly useful in horticulture for reproducing plants with desired qualities.
Discuss Environmental Impact-
- Environmental factors like temperature, humidity, and soil conditions significantly affect vegetative propagation. Optimal conditions can enhance rooting and growth, while unfavourable conditions can hinder the process.
Advantages and Disadvantages-
- Advantages- Quick reproduction, uniformity of progeny, preservation of characteristics.
- Disadvantages- Lack of genetic diversity, potential spread of diseases, reduced adaptability to environmental changes.
Flower Anatomy-
- A flower typically includes sepals, petals, stamens (male reproductive organs with anthers and filaments), and carpels or pistils (female reproductive organs with stigma, style, and ovary). Each part plays a role in attracting pollinators, producing gametes, and facilitating fertilisation.
Seed Development-
- After fertilisation, the ovule develops into a seed. The embryo forms inside the seed, surrounded by a protective seed coat. The seed undergoes maturation and dormancy until conditions are favourable for germination.
Practical Application-
- Understanding plant reproduction is crucial in agriculture and horticulture for breeding plants with desirable traits, improving crop yields, developing disease-resistant varieties, and conserving plant biodiversity.
Also Check – Asexual Reproduction Basics – Simplified for Young Learners
Worksheet 4 – Chapter 8 – Reproduction in Plants – Student Worksheet (Unsolved)
Short Answer Questions-
(a) Describe two natural methods of vegetative propagation in plants.
(b) What role do flowers play in the sexual reproduction of plants?
(c) Explain the process of budding in plants and its importance.
(d) How does spore formation aid in the reproduction of certain plants?
Diagram-Based Questions-
(a) Draw a labelled diagram of a flower, indicating the main reproductive parts.
(b) Illustrate the process of vegetative propagation in plants using the example of a potato plant.
Comparative Analysis-
(a) Compare and contrast sexual and asexual reproduction in plants, citing examples.
(b) Discuss the differences between vegetative propagation and reproduction through spores.
Detailed Explanations-
(a) Describe the process of pollination and its significance in plant reproduction.
(b) Explain how fruits are formed in plants and their role in seed dispersal.
Critical Thinking-
(a) Why is sexual reproduction important for the genetic diversity of plant species?
(b) Discuss the advantages and disadvantages of vegetative propagation.
Application-Based Questions-
(a) How can knowledge of plant reproduction be applied in agriculture for crop improvement?
(b) Describe a scenario where vegetative propagation is preferred over sexual reproduction in commercial plant cultivation.
Also Check – NCERT Solutions for Class 7 Science Chapter 12-Reproduction in Plants
Worksheet 4 – Chapter 8 – Reproduction in Plants – Solved Worksheet with Answer
Short Answer Questions-
- (a) Two natural methods of vegetative propagation in plants-
- Runners- Some plants like strawberries produce horizontal stems called runners or stolons, which give rise to new plants at their tips.
- Rhizomes- Plants like ginger and turmeric use underground stems called rhizomes to produce new plants.
- (b) Role of flowers in the sexual reproduction of plants-
- Flowers are the reproductive structures of angiosperms (flowering plants). They contain the male (stamen) and female (carpel/pistil) reproductive organs. Flowers facilitate pollination, the transfer of pollen from anthers to stigma, leading to fertilisation and seed production.
- (c) Process and importance of budding in plants-
- Budding is a form of asexual reproduction where a new organism develops from an outgrowth or bud due to cell division. In plants, it is seen in yeast and some small plants. It is important for rapid and effective reproduction without the need for seeds.
- (d) Spore formation in plant reproduction-
- Spore formation is a method of asexual reproduction where plants produce spores that can develop into new individuals. It is common in fungi, algae, and non-flowering plants like ferns. Spores are typically resistant to harsh conditions and can spread easily, aiding in survival and dispersal.
Diagram-Based Questions-
- (a) Labelled diagram of a flower-
- Typically, a flower consists of-
- Sepals- Protect the flower before it opens.
- Petals- Attract pollinators.
- Stamen (Male part)- Includes anther (produces pollen) and filament.
- Carpel/Pistil (Female part)- Includes stigma (receives pollen), style, and ovary (contains ovules).
- Typically, a flower consists of-
- (b) Illustration of vegetative propagation in potato plants-
- Potato plants reproduce vegetatively through tubers, which are swollen ends of underground stems. Each tube has several eyes, which are buds that can grow into new plants.
Comparative Analysis-
- (a) Sexual vs. Asexual reproduction in plants-
- Sexual reproduction involves the fusion of male and female gametes, leading to genetically diverse offspring. It typically occurs through flowers. Asexual reproduction involves a single parent and results in offspring genetically identical to the parent, common methods include runners, rhizomes, and budding.
- (b) Vegetative propagation vs. Spore formation-
- Vegetative propagation involves the growth of new plants from vegetative parts like stems, leaves, or roots and is typical in many higher plants. Spore formation involves the production of spores capable of developing into new plants and is typical in fungi, algae, and some non-flowering plants.
Detailed Explanations-
- (a) Process and significance of pollination-
- Pollination is the transfer of pollen grains from the male anther to the female stigma. It can be done by wind, water, or animals. Following pollination, fertilisation can occur, leading to the development of seeds and fruit. It’s crucial for genetic diversity and survival of plant species.
- (b) Formation and role of fruits in plants-
- Fruits develop from the fertilised ovary of a flower. They protect the developing seeds and aid in their dispersal through various mechanisms like wind, water, or animals. Fruits are also crucial for attracting animals, which eat the fruit and disperse the seeds.
Critical Thinking-
- (a) Importance of sexual reproduction for genetic diversity-
- Sexual reproduction combines the genetic material of two parents, leading to offspring with unique genetic combinations. This genetic diversity is crucial for adaptation, survival, and evolution of species.
- (b) Advantages and disadvantages of vegetative propagation-
- Advantages include rapid reproduction, preserving desirable traits, and no need for pollinators. Disadvantages include lack of genetic diversity, potential for rapid spread of diseases, and limited adaptability to changing environments.
Application-Based Questions-
- (a) Application of plant reproduction knowledge in agriculture-
- Understanding plant reproduction is fundamental for breeding new crop varieties with desired traits such as higher yield, disease resistance, or improved nutritional quality. It also aids in conservation and restoration efforts.
- (b) Preference for vegetative propagation in commercial cultivation-
- In commercial cultivation, vegetative propagation is preferred for plants that do not produce viable seeds, to replicate plants with specific traits exactly, or for rapid production. It’s widely used in horticulture for ornamental plants, as well as in the cultivation of many fruit trees and agricultural crops.
Worksheet 5 – Chapter 8 – Reproduction in Plants – Student Worksheet (Unsolved)
Define and Explain-
(a) Define sexual reproduction in plants and list two key stages in this process.
(b) What is vegetative propagation? Provide two examples of vegetative propagation in plants.
(c) Explain how fragmentation occurs in algae and its significance in reproduction.
Diagram Analysis-
(a) Draw and label the parts of a typical flowering plant’s reproductive system.
(b) Sketch the process of vegetative propagation in Bryophyllum, highlighting how new plants grow from leaves.
True or False – Justify Your Answer-
(a) All plants require seeds for reproduction. (T/F)
(b) Fertilisation in plants only occurs in the presence of water. (T/F)
Multiple Choice Questions (MCQs)-
(a) What is the primary role of the ovary in plant reproduction?
(i) Produces pollen (ii) Produces nectar (iii) Becomes the fruit (iv) Attracts pollinators
(b) In which plant does fragmentation play a crucial role in reproduction?
(i) Mango (ii) Algae (iii) Rose (iv) Potato
Explanatory Questions-
(a) Discuss the process of pollination and its importance in plant reproduction.
(b) Describe the advantages and limitations of asexual reproduction in plants.
Case Study Analysis-
(a) Given a scenario where a plant species reproduces only through spores, explain the reproductive strategy and potential challenges it might face.
(b) Analyze how vegetative propagation is beneficial in horticulture, using specific plant examples.
Application-Based Question-
Discuss how understanding different modes of plant reproduction can aid in agricultural practices and biodiversity conservation.
Comparative Study-
Compare and contrast the reproductive strategies of flowering plants and non-flowering plants like ferns and mosses.
Worksheet 5 – Chapter 8 – Reproduction in Plants – Solved Worksheet with Answer
Define and Explain-
- (a) Sexual reproduction in plants is the process where male and female gametes (pollen and ovules) fuse to form a zygote, leading to the development of a new plant. The two key stages are pollination (transfer of pollen to stigma) and fertilisation (fusion of gametes).
- (b) Vegetative propagation is a type of asexual reproduction in which new plants grow from vegetative parts like leaves, stems, or roots. Examples include the production of runners in strawberries and the development of tubers in potatoes.
- (c) Fragmentation in algae occurs when an organism breaks into parts, and each part grows into a new organism. It’s significant as it allows rapid reproduction and colonisation of new areas, which is crucial for survival and spread, especially in algae.
Diagram Analysis-
- (a) Parts of a typical flowering plant’s reproductive system-
- Stamen (male reproductive part)- Consists of anther and filament.
- Pistil/Carpel (female reproductive part)- Consists of stigma, style, and ovary.
- (b) Vegetative propagation in Bryophyllum-
- New plants grow from the leaf margins where notches form small buds. These buds grow into new plants when the leaf detaches and falls to the ground.
True or False – Justify Your Answer-
- (a) All plants require seeds for reproduction. (F) – Many plants can reproduce asexually without seeds, such as those that use vegetative propagation methods like cuttings, runners, or tubers.
- (b) Fertilisation in plants only occurs in the presence of water. (F) – While water is essential for some plants’ fertilisation, many plants (especially terrestrial ones) fertilise through pollination, which doesn’t necessarily require water.
Multiple Choice Questions (MCQs)-
- (a) What is the primary role of the ovary in plant reproduction?
- Answer- (iii) Becomes the fruit – After fertilisation, the ovary develops into a fruit, enclosing the seeds.
- (b) In which plant does fragmentation play a crucial role in reproduction?
- Answer- (ii) Algae – Fragmentation is a common method of asexual reproduction in algae.
Explanatory Questions-
- (a) Pollination- Pollination is the transfer of pollen from the male part (anther) to the female part (stigma) of a flower. It can occur via wind, water, or animal pollinators. It’s vital for sexual reproduction as it allows for fertilisation and genetic diversity.
- (b) Advantages and limitations of asexual reproduction- Advantages include faster reproduction and production of numerous identical offspring. Limitations include lack of genetic diversity, which may lead to vulnerability to diseases and environmental changes.
Case Study Analysis-
- (a) Reproduction through spores- Plants like ferns reproduce through spores, which are typically resistant and can survive in harsh conditions. Challenges include reliance on suitable conditions for germination and limited dispersal distance.
- (b) Vegetative propagation in horticulture- It’s beneficial for reproducing plants with desirable traits quickly and efficiently. For example, grafting in apple trees ensures the new plants have the same qualities as the parent plant.
Application-Based Question-
- Understanding various modes of plant reproduction can significantly improve agricultural practices by allowing for the cultivation of desirable traits, ensuring food security, and aiding in biodiversity conservation through selective breeding and habitat restoration.
Comparative Study-
- Flowering plants typically reproduce sexually through pollination and seed formation. Non-flowering plants like ferns and mosses might use spores for reproduction. While flowering plants offer genetic diversity through sexual reproduction, non-flowering plants often reproduce quickly and adaptively in various environments through spores or vegetative parts.
Worksheet 6 – Chapter 8 – Reproduction in Plants – Student Worksheet (Unsolved)
Diagram Interpretation-
(a) Draw a diagram of a flower and label its reproductive parts.
(b) Illustrate and label the process of vegetative propagation in a potato.
Explanatory Questions-
(a) Explain the process and importance of pollination in plants.
(b) Describe the process of seed dispersal and its significance in plant survival.
Comparative Analysis-
Compare and contrast vegetative propagation and sexual reproduction in plants, highlighting their main differences and advantages.
Scenario-Based Questions-
(a) Given a plant that reproduces through budding, describe the steps involved in this reproductive process.
(b) Explain how a gardener could use vegetative propagation to propagate a rare plant species.
True or False-
(a) Seeds are necessary for all types of plant reproduction. (T/F)
(b) Vegetative propagation results in offspring that are genetically diverse. (T/F)
Multiple Choice Questions-
(a) Which of the following is an example of asexual reproduction in plants?
(i) Fertilisation (ii) Budding (iii) Pollination (iv) Germination
(b) Which part of the plant is primarily involved in vegetative propagation?
(i) Flowers (ii) Leaves (iii) Roots (iv) Seeds
Short Answer Questions-
(a) What role do fruits play in the reproductive process of flowering plants?
(b) How does fragmentation contribute to the reproduction of algae?
Discussion-Based Questions
Discuss the advantages and disadvantages of using vegetative propagation in commercial farming and horticulture.
Practical Application-
Describe how knowledge of plant reproduction can be beneficial in genetic engineering and crop improvement.
Fill in the Blanks-
(a) In flowering plants, the male reproductive organ is called the ____, while the female reproductive organ is called the ____.
(b) The process where a single organism reproduces without the involvement of another organism is called ____ reproduction.
Worksheet 6 – Chapter 8 – Reproduction in Plants – Solved Worksheet with Answer
Diagram Interpretation-
- (a) Diagram of a Flower-
- A typical flower includes-
- Stamen (Male part)- Consisting of anther (produces pollen) and filament.
- Carpel/Pistil (Female part)- Consisting of stigma (receives pollen), style, and ovary (contains ovules).
- A typical flower includes-
- (b) Vegetative Propagation in Potato-
- Illustrate a potato with eyes (buds) from which new shoots sprout, leading to the growth of new potato plants.
Explanatory Questions-
- (a) Pollination in Plants-
- Pollination is the transfer of pollen grains from the male anther to the female stigma. It’s crucial for sexual reproduction, leading to fertilisation and seed formation, ensuring the continuation and genetic diversity of plant species.
- (b) Seed Dispersal-
- Seed dispersal is the process of spreading seeds away from the parent plant. It prevents competition for resources and allows colonisation of new areas. Methods include wind, water, animals, and self-dispersal mechanisms.
Comparative Analysis-
- Vegetative Propagation vs. Sexual Reproduction-
- Vegetative Propagation- Involves a single parent, produces genetically identical offspring, and occurs through methods like cuttings, runners, and tubers. Advantageous for rapid and exact replication of desirable traits.
- Sexual Reproduction- Involves the fusion of male and female gametes, leading to genetically diverse offspring, and usually occurs through flowers. It’s beneficial for adaptability and evolution of species.
Scenario-Based Questions-
- (a) Budding in Plants-
- In budding, a new organism develops from a bud on the parent plant. The bud grows and eventually detaches to form a new, genetically identical plant. Common in yeast and some small plants.
- (b) Vegetative Propagation in Gardening-
- A gardener can use methods like cuttings, grafting, or layering to propagate rare plants. These methods allow for the rapid production of large numbers of plants while preserving specific traits.
True or False-
- (a) Seeds are necessary for all types of plant reproduction. (F) – Asexual reproduction doesn’t require seeds.
- (b) Vegetative propagation results in offspring that are genetically diverse. (F) – Offspring are genetically identical to the parent.
Multiple Choice Questions-
- (a) Which is an example of asexual reproduction in plants?
- Answer- (ii) Budding
- (b) Which part of the plant is primarily involved in vegetative propagation?
- Answer- (iii) Roots
Short Answer Questions-
- (a) Role of Fruits in Flowering Plants-
- Fruits develop from the fertilised ovary and contain seeds. They protect the developing seeds and aid in their dispersal, ensuring the spread of the species.
- (b) Fragmentation in Algae-
- Fragmentation is when an algae organism breaks into parts, each of which can grow into a new organism. It allows rapid reproduction and colonisation in suitable environments.
Discussion-Based Questions
- Advantages and Disadvantages of Vegetative Propagation-
- Advantages- Rapid multiplication, uniform quality, preservation of characteristics. Disadvantages- Lack of genetic diversity, potential spread of diseases, and dependency on the parent plant’s health.
Practical Application-
- Knowledge of plant reproduction is crucial in genetic engineering for developing new plant varieties with desired traits like disease resistance or improved yield, and for crop improvement through selective breeding.
Fill in the Blanks-
- (a) In flowering plants, the male reproductive organ is called the stamen, while the female reproductive organ is called the carpel/pistil.
- (b) The process where a single organism reproduces without the involvement of another organism is called asexual reproduction.
