CBSE Class Notes Online – Classnotes123
CBSE Class Notes, Worksheets, Question Answers, Diagrams , Definitions , Diffrence between , Maths Concepts, Science Facts Online – Classnotes123
Absorption- Definition- Absorption is the process by which digested food materials are taken up into the bloodstream from the walls of the small intestine for distribution to various body organs. …
Class 7 science -Chapter 2 – Nutrition in Animals – Definition and Explanation of Important Keywords Read More
Grass-eating animals, including cows, buffaloes, and deer, have evolved intricate digestive systems to effectively process plant material as their primary food source. This process, known as digestion in grass-eating animals, …
Digestion in Grass Eating Animals – Class 7 Read More
The Hydrilla experiment demonstrates photosynthesis by observing oxygen bubble production under varied light conditions. Using Hydrilla, water, sodium bicarbonate, and light, we can visually see photosynthesis rates through bubble count, highlighting the process’s dependency on light and CO₂.
Hydrilla Experiment – Reveals the Release of Oxygen during Photosynthesis Read MoreNutrition in Plants Questions with Answers – Short Answer Worksheet Question – What is nutrition in plants? Answer- Nutrition in plants refers to the process by which plants obtain and …
Nutrition in Plants – Class 7 Extra Questions with Answers Worksheet Read More
Nutrition in plants encompasses various processes, including photosynthesis, where chlorophyll in leaves captures sunlight to convert carbon dioxide and water into glucose and oxygen. Stomata, tiny openings on leaves, facilitate gas exchange. Other modes of nutrition include parasitic plants, insectivorous plants that capture and digest prey, and saprotrophic nutrition involving decomposers. Symbiotic relationships, like with Rhizobium bacteria, aid nutrient replenishment in the soil.
Chapter 1- Nutrition in Plants -Class 7 – Detailed Notes Read MoreNutrients in the soil are replenished through the roles of decomposers and nitrogen fixation. Decomposers break down organic matter, releasing inorganic nutrients back into the soil. Nitrogen fixation converts atmospheric nitrogen into a usable form for plants. Conservation methods like organic farming, crop rotation, and conservation tillage help maintain soil fertility. These processes sustain nutrient replenishment and support sustainable agriculture.
How are Nutrients Replenished in the Soil? Read More
Photosynthesis, the process by which plants convert sunlight into energy, can be summarised by the equation for photosynthesis. The chemical equation, 6CO2 + 6H2O + light energy → C6H12O6 + 6O2, represents the balanced reaction. It outlines the conversion of carbon dioxide and water into glucose and oxygen with the help of sunlight. This word equation simplifies the process for easier understanding.
Equation for Photosynthesis Read More
Photosynthesis is influenced by various factors. Light intensity, temperature, carbon dioxide content and the availability of water are decisive factors. Sufficient light energy is crucial for the process, while an optimal temperature ensures enzyme activity. Sufficient carbon dioxide is necessary and water availability affects stomatal opening. Together, these factors affect the speed and efficiency of photosynthesis in plants.
Name the factors affecting Photosynthesis Read MoreThe diagram of the guard cells illustrates the specialised cells surrounding the stomata. These kidney-shaped cells with thicker outer walls swell when filled with water, causing the stomata to open. Conversely, they become flaccid when they lose water, causing the stomata to close. This process, controlled by vacuoles and cell walls, regulates gas exchange and water loss in plants.
Guard Cell Diagram Read More
Peristalsis is a vital biological process that facilitates the movement of food through the digestive system. It involves rhythmic contractions of smooth muscles, creating a wave-like motion known as peristaltic waves. These waves propel food through the digestive tract and ensure efficient digestion and absorption of nutrients. Peristaltic movements are coordinated by the enteric nervous system and provide the motility necessary for proper gastrointestinal function.
Peristalsis- The Rhythmic Journey Through Your Body Read More