Table of Contents
Nutrition in Plants- Worksheets
These worksheets are related to the chapter on “Nutrition in Plants.” The chapter explores how plants obtain nutrients, focusing on autotrophic and heterotrophic nutrition. The provided worksheets include both solved and unsolved versions to aid in learning.
Key concepts covered in the chapter and explored through these worksheets include:
- Autotrophic Nutrition: Understanding how plants produce their own food through photosynthesis, using sunlight, carbon dioxide, and water.
- Heterotrophic Nutrition: Learning about plants that do not produce their own food and depend on other organisms, including parasitic and saprotrophic nutrition.
- Soil Nutrient Replenishment: Studying how nutrients are cycled back into the soil, including the role of nitrogen-fixing bacteria.
The solved worksheets offer solutions and approaches to these topics, while the unsolved worksheets provide opportunities for practice and self-assessment.
Also Check – Rapid Revision – Class 7 Science -Chapter 1- Nutrition in Plants – Complete Notes
Worksheet 1 – Nutrition in Plants – Student Worksheet (Unsolved)
Why do organisms take food?
Distinguish between a parasite and a saprotroph.
How would you test the presence of starch in leaves?
Give a brief description of the process of synthesis of food in green plants.
Show with the help of a sketch that plants are the ultimate source of food.
Fill in the blanks-
(a) Green plants are called _________________ since they synthesise their own food.
(b) The food synthesised by plants is stored as _________________.
(c) In photosynthesis, solar energy is absorbed by the pigment called _________________.
(d) During photosynthesis, plants take in ______________________ and release __________________ gas.
Name the following-
(i) A parasitic plant with yellow, slender and branched stems.
(ii) A plant that is partially autotrophic.
(iii) The pores through which leaves exchange gases.
Tick the correct answer-
(a) Cuscuta is an example of-
(i) autotroph (ii) parasite (iii) saprotroph (iv) host
(b) The plant which traps and feeds on insects is-
(i) Cuscuta (ii) china rose (iii) pitcher plant (iv) rose
Match the items given in Column I with those in Column II-
| Column I | Column II |
| Chlorophyll | Rhizobium |
| Nitrogen | Heterotrophs |
| Cuscuta | Pitcher plant |
| Animals | Leaf |
| Insects | Parasite |
Mark ‘T’ if the statement is true and ‘F’ if it is false-
(i) Carbon dioxide is released during photosynthesis. (T/F)
(ii) Plants which synthesise their food are called saprotrophs. (T/F)
(iii) The product of photosynthesis is not a protein. (T/F)
(iv) Solar energy is converted into chemical energy during photosynthesis. (T/F)
Choose the correct option from the following-
Which part of the plant takes in carbon dioxide from the air for photosynthesis?
(i) Root hair (ii) Stomata (iii) Leaf veins (iv) Petals
Choose the correct option from the following-
Plants take carbon dioxide from the atmosphere mainly through their-
(i) roots (ii) stem (iii) flowers (iv) leaves
Why do farmers grow many fruits and vegetable crops inside large greenhouses? What are the advantages to the farmers?
Also Check – Chapter 1- Nutrition in Plants -Class 7 – Detailed Notes
Worksheet 1 – Nutrition in Plants – Solved Worksheet with Answer
Why do organisms take food?
- Organisms take food to obtain energy, essential nutrients, and organic materials needed for growth, development, and maintenance of their bodily functions.
Distinguish between a parasite and a saprotroph.
- A parasite feeds on living organisms without killing them, often harming them, whereas a saprotroph feeds on dead and decaying organic matter, breaking it down.
How would you test the presence of starch in leaves?
- To test for starch in leaves, you can use the iodine test. First, boil the leaf to kill it, then immerse it in alcohol to remove chlorophyll, and finally, add iodine solution. If starch is present, the leaf will turn blue-black.
Give a brief description of the process of synthesis of food in green plants.
- Green plants synthesise food through photosynthesis. They use sunlight, carbon dioxide, and water to produce glucose and oxygen. This process occurs in the chloroplasts of the plant cells, primarily in the leaves.
Show with the help of a sketch that plants are the ultimate source of food.
- [Sketch of a plant with arrows showing sunlight, water, and CO2 entering, and O2 and glucose exiting, indicating the plant as a source of energy and food for other organisms.]
Fill in the blanks-
(a) autotrophs
(b) starch
(c) chlorophyll
(d) carbon dioxide; oxygen
Name the following-
(i) Cuscuta
(ii) Venus Flytrap
(iii) Stomata
Tick the correct answer-
(a) (ii) parasite
(b) (iii) pitcher plant
Match the items given in Column I with those in Column II-
Chlorophyll – Sunlight absorption
Nitrogen – Heterotrophs
Cuscuta – Parasite
Animals – Leaf
Insects – Pitcher plant
Mark ‘T’ if the statement is true and ‘F’ if it is false-
(i) F
(ii) F
(iii) T
(iv) T
Choose the correct option from the following-
(ii) Stomata
Choose the correct option from the following-
(iv) leaves
Why do farmers grow many fruits and vegetable crops inside large greenhouses? What are the advantages to the farmers?
Farmers grow crops in greenhouses to provide a controlled environment that protects plants from extreme weather, pests, and diseases. Greenhouses allow for year-round cultivation, better growth conditions, and higher yield and quality.
Also Check – Nutrition in Plants – Class 7 Questions with Answers Worksheet
Worksheet 2 – Nutrition in Plants – Student Worksheet – Unsolved
Explain how plants obtain nitrogen and its significance in plant nutrition.
Describe the role of the sun in the process of photosynthesis.
What are the main differences between autotrophs and heterotrophs?
Explain the process by which leaves exchange gases.
Illustrate and label the parts of a plant involved in the process of photosynthesis.
Complete the following sentences-
(a) The process of taking in nutrients from dead and decaying matter is known as ________________.
(b) _________________ _ is a process where plants prepare food using water, carbon dioxide, and sunlight.
(c) The green pigment in plants that absorbs light energy is called _________________.
(d) Plants release oxygen and take in _________________ during the process of photosynthesis.
Identify the following-
(i) A plant that feeds on insects.
(ii) A non-green plant that absorbs food from other living organisms.
(iii) The gas released by plants during photosynthesis.
Select the correct option-
(a) The main function of the root in plants is to-
(i) Absorb sunlight (ii) Synthesize food (iii) Absorb water and minerals (iv) Release oxygen
(b) Which of these is not a part of photosynthesis?
(i) Sunlight (ii) Soil nutrients (iii) Carbon dioxide (iv) Water
Match the following-
| Column I | Column II |
| Root | Photosynthesis |
| Leaf | Absorbs water and minerals |
| Sunlight | Produces food |
| Carbon dioxide | Necessary for growth |
True or False Statements-
(i) All green plants can prepare their own food. (T/F)
(ii) Water is not necessary for photosynthesis. (T/F)
(iii) Photosynthesis occurs in the roots of the plant. (T/F)
(iv) Nitrogen fixation is a part of the photosynthesis process. (T/F)
Choose the correct answer-
What is the primary function of chlorophyll in photosynthesis?
(i) Absorbing water (ii) Absorbing sunlight (iii) Releasing oxygen (iv) Absorbing carbon dioxide
Multiple-choice question-
Which of these elements is not directly involved in photosynthesis?
(i) Oxygen (ii) Carbon dioxide (iii) Nitrogen (iv) Sunlight
Explain the importance of photosynthesis in the ecosystem.
Also Check – NCERT Solutions for Class 7 Science Chapter 1: Nutrition In Plants
Worksheet 2 – Nutrition in Plants – Solved Worksheet with Answer
Explain how plants obtain nitrogen and its significance in plant nutrition.
Plants obtain nitrogen primarily from the soil in the form of nitrate or ammonium ions. Nitrogen is crucial for plant nutrition as it is a key component of amino acids, proteins, nucleic acids, and chlorophyll. Some plants, like legumes, have a symbiotic relationship with nitrogen-fixing bacteria to convert atmospheric nitrogen into a usable form.
Describe the role of the sun in the process of photosynthesis.
The sun plays a critical role in photosynthesis by providing the energy needed to drive the chemical reactions. Sunlight is absorbed by chlorophyll, which then converts carbon dioxide and water into glucose and oxygen, releasing energy.
What are the main differences between autotrophs and heterotrophs?
Autotrophs can synthesise their own food from inorganic substances, using light or chemical energy, while heterotrophs cannot synthesise their food and rely on other organisms for their nutrition.
Explain the process by which leaves exchange gases.
Leaves exchange gases through tiny openings called stomata. Oxygen and water vapour are released from the stomata, and carbon dioxide enters for use in photosynthesis. This gas exchange is essential for photosynthesis and respiration.
Illustrate and label the parts of a plant involved in the process of photosynthesis.
[An illustration showing a plant with labelled parts such as leaves, stomata, roots, and chloroplasts in the cells where photosynthesis takes place.]
Complete the following sentences-
(a) saprotrophic nutrition
(b) Photosynthesis
(c) chlorophyll
(d) carbon dioxide
Identify the following-
(i) Venus Flytrap or Pitcher Plant
(ii) Cuscuta (Dodder)
(iii) Oxygen
Select the correct option-
(a) (iii) Absorb water and minerals
(b) (ii) Soil nutrients
Match the following-
- Root – Absorbs water and minerals
- Leaf – Produces food
- Sunlight – Necessary for growth
- Carbon dioxide – Photosynthesis
True or False Statements-
(i) T
(ii) F
(iii) F
(iv) F
Choose the correct answer-
(ii) Absorbing sunlight
Multiple-choice question-
(iii) Nitrogen
Explain the importance of photosynthesis in the ecosystem.
Photosynthesis is vital for the ecosystem as it is the primary process that converts solar energy into chemical energy, producing oxygen and organic compounds. This process sustains the life of plants and organisms that feed on plants, forming the basis of most food chains. It also plays a crucial role in regulating the atmosphere’s oxygen and carbon dioxide levels, supporting diverse life forms on Earth.
Worksheet 3 – Nutrition in Plants – Student Worksheet – Unsolved
Explain the process and significance of photosynthesis in plants.
Describe the different modes of nutrition in plants and give examples of each.
What are parasitic plants? Give an example and explain how they obtain food.
Discuss the concept of insectivorous plants. Why do these plants consume insects?
Explain the process by which green plants prepare food using carbon dioxide and water.
Complete the following sentences-
(a) The raw materials for photosynthesis are _________________ and _________________.
(b) The main product of photosynthesis is _________________.
(c) Plants that do not have chlorophyll obtain food through _________________ nutrition.
(d) The association of Rhizobium bacteria with leguminous plants is an example of _________________.
Identify the following-
(i) A green plant that traps and digests insects.
(ii) A non-green plant that derives food from a host plant.
(iii) Bacteria that convert atmospheric nitrogen into usable forms for plants.
Choose the correct answer-
(a) Which part of the plant is primarily involved in photosynthesis?
(i) Roots (ii) Stems (iii) Leaves (iv) Flowers
(b) The process by which plants release oxygen is-
(i) Respiration (ii) Transpiration (iii) Photosynthesis (iv) Nutrition
Match the following-
| Column I | Column II |
| Autotrophs | Produces own food |
| Heterotrophs | Depends on others for food |
| Photosynthesis | Sunlight to chemical energy |
| Saprotrophs | Feeds on dead and decaying matter |
True or False Statements-
(i) All plants are autotrophs. (T/F)
(ii) Chlorophyll is necessary for photosynthesis. (T/F)
(iii) Insectivorous plants are entirely heterotrophic. (T/F)
(iv) Saprotrophic nutrition involves the consumption of living organisms. (T/F)
Choose the correct answer-
Which of the following is not a product of photosynthesis?
(i) Oxygen (ii) Carbon dioxide (iii) Glucose (iv) Water
Multiple-choice question-
In which part of a plant does nitrogen fixation primarily occur?
(i) Leaves (ii) Stems (iii) Roots (iv) Flowers
Discuss the importance of nitrogen in plant nutrition and how plants acquire it?
Worksheet 3 – Nutrition in Plants – Solved Worksheet with Answer
Explain the process and significance of photosynthesis in plants.
Photosynthesis is the process by which green plants use sunlight to convert carbon dioxide and water into glucose and oxygen. This process is significant because it produces the oxygen we breathe and provides energy in the form of glucose for the plants themselves and ultimately for other organisms that consume plants.
Describe the different modes of nutrition in plants and give examples of each.
- Autotrophic nutrition- Plants like grass that synthesise their own food using sunlight, water, and carbon dioxide.
- Heterotrophic nutrition- Plants like Venus Flytrap that depend on other organisms for food.
- Saprotrophic nutrition- Fungi that absorb nutrients from dead and decaying matter.
- Parasitic nutrition- Plants like Cuscuta that derive nutrients from living host plants.
What are parasitic plants? Give an example and explain how they obtain food.
Parasitic plants, like Cuscuta, obtain nutrients by attaching to and absorbing resources from a host plant. They lack chlorophyll and depend entirely on their host for survival.
Discuss the concept of insectivorous plants. Why do these plants consume insects?
Insectivorous plants, such as the Venus Flytrap, consume insects to supplement their nutritional requirements, particularly in nitrogen-poor environments. They trap and digest insects to obtain essential nutrients like nitrogen.
Explain the process by which green plants prepare food using carbon dioxide and water.
Green plants prepare food through photosynthesis, where they absorb carbon dioxide from the air and water from the soil. With sunlight energy captured by chlorophyll, they convert these into glucose and release oxygen as a by-product.
Complete the following sentences-
(a) carbon dioxide and water
(b) glucose
(c) heterotrophic
(d) symbiotic
Identify the following-
(i) Venus Flytrap
(ii) Dodder plant (Cuscuta)
(iii) Rhizobium bacteria
Choose the correct answer-
(a) (iii) Leaves
(b) (iii) Photosynthesis
Match the following-
- Autotrophs – Produces own food
- Heterotrophs – Depends on others for food
- Photosynthesis – Sunlight to chemical energy
- Saprotrophs – Feeds on dead and decaying matter
True or False Statements-
(i) F
(ii) T
(iii) F
(iv) F
Choose the correct answer-
(ii) Carbon dioxide
Multiple-choice question-
(iii) Roots
Discuss the importance of nitrogen in plant nutrition and how plants acquire it.
Nitrogen is essential in plant nutrition as it is a key component of amino acids, proteins, and chlorophyll. Plants acquire nitrogen primarily through their roots in the form of nitrate and ammonium ions from the soil. Some plants engage in symbiotic relationships with nitrogen-fixing bacteria to convert atmospheric nitrogen into forms usable by plants.
Worksheet 4 – Nutrition in Plants – Student Worksheet – Unsolved
Explain the process of photosynthesis and its significance.
Differentiate between autotrophic and heterotrophic nutrition in plants.
Describe how plants absorb water and minerals from the soil.
What is the role of chlorophyll in photosynthesis?
Illustrate how the transportation of water and minerals occurs in plants.
Complete the following sentences-
(a) Leaves are known as the _________________ of the plant.
(b) The tiny pores on the surface of leaves are called _________________.
(c) During photosynthesis, plants convert sunlight into _________________ energy.
(d) The process of photosynthesis occurs in the _________________ of the leaves.
Identify the following-
(i) A green pigment essential for photosynthesis.
(ii) The part of the plant where photosynthesis primarily occurs.
(iii) A type of plant that can perform photosynthesis in its green stems.
Choose the correct answer-
(a) The primary products of photosynthesis are-
(i) Oxygen and carbohydrates (ii) Carbon dioxide and water (iii) Nitrogen and glucose (iv) Water and minerals
(b) Which part of the plant cell is responsible for photosynthesis?
(i) Nucleus (ii) Mitochondria (iii) Chloroplast (iv) Cell membrane
Match the following-
| Column I | Column II |
| Photosynthesis | Oxygen production |
| Stomata | Carbon dioxide intake |
| Chlorophyll | Sunlight absorption |
| Roots | Water and mineral absorption |
True or False Statements-
(i) Only the leaves of a plant can perform photosynthesis. (T/F)
(ii) Photosynthesis can occur without sunlight. (T/F)
(iii) All plants are capable of photosynthesis. (T/F)
(iv) Photosynthesis is essential for oxygen production on Earth. (T/F)
Choose the correct answer-
Which of the following is not involved in the process of photosynthesis?
(i) Sunlight (ii) Chlorophyll (iii) Soil nutrients (iv) Carbon dioxide
Multiple-choice question-
What is the importance of nitrogen for plants?
(i) It aids in photosynthesis (ii) It helps in protein synthesis (iii) It provides energy (iv) It is a source of chlorophyll
Explain how plants that do not have chlorophyll obtain their nutrition.
Worksheet 4 – Nutrition in Plants – Solved Worksheet with Answer
Explain the process of photosynthesis and its significance.
Photosynthesis is the process by which green plants use sunlight to convert carbon dioxide and water into glucose and oxygen. This process is vital as it provides the basic energy source for almost all organisms and is responsible for the production of oxygen, which is essential for most life forms on Earth.
Differentiate between autotrophic and heterotrophic nutrition in plants.
Autotrophic nutrition involves plants producing their own food using sunlight, carbon dioxide, and water (like most green plants). Heterotrophic nutrition involves plants obtaining food from other sources because they cannot produce it themselves (like fungi or parasitic plants).
Describe how plants absorb water and minerals from the soil.
Plants absorb water and minerals from the soil through their roots. The root hairs increase the surface area, enhancing the absorption. Water and dissolved minerals are then transported upwards through the plant’s vascular system, particularly the xylem.
What is the role of chlorophyll in photosynthesis?
Chlorophyll is a green pigment in the leaves that absorbs sunlight, providing the energy necessary for photosynthesis to convert carbon dioxide and water into glucose and oxygen.
Illustrate how the transportation of water and minerals occurs in plants.
[An illustration would show roots absorbing water and minerals, which then travel up through the xylem to the leaves and other parts of the plant.]
Complete the following sentences-
(a) food factory
(b) stomata
(c) chemical
(d) chloroplasts
Identify the following-
(i) Chlorophyll
(ii) Leaves
(iii) Cactus
Choose the correct answer-
(a) (i) Oxygen and carbohydrates
(b) (iii) Chloroplast
Match the following-
Photosynthesis – Oxygen production
Stomata – Carbon dioxide intake
Chlorophyll – Sunlight absorption
Roots – Water and mineral absorption
True or False Statements-
(i) F
(ii) F
(iii) F
(iv) T
Choose the correct answer-
(iii) Soil nutrients
Multiple-choice question–
(ii) It helps in protein synthesis
Explain how plants that do not have chlorophyll obtain their nutrition.
Plants without chlorophyll, such as fungi or parasitic plants, obtain their nutrition heterotrophically. They either decompose and absorb nutrients from dead organic matter (saprotrophic nutrition) or absorb nutrients from living host plants (parasitic nutrition).
