Notes for class 7 science chapter 1 nutrition in plants (english medium)

NCERT Notes for class 7 science chapter 1 Nutrition in Plants in english 

• Autotrophic: The mode of nutrition in which organisms make food themselves from simple substances is called autotrophic ( auto = self ; trophs = nourishment ) nutrition.

Plants are called autotrophs.

• Chlorophyll: The leaves have a green pigment called chlorophyll. It helps leaves to capture the energy of the sunlight.

• Heterotrophs: Animals and most other organisms take in food prepared by plants. They are called heterotrophs ( heteros = other). 

• Host: The plant which does not have chlorophyll and takes readymade food from the plant on which it is climbing is called the host.

• Insectivorous: When an insect is land in the pitcher, the lid closes and the insect is trapped. The insect is digested by the digestive juices secreted in the pitcher and its nutrients are absorbed.

Insect eating plants are called insectivorous plants.

• Nutrient: Food is essential for all living organisms. Carbohydrates, proteins,fats, vitamins and minerals are components of food. These components of food are called nutrients and are necessary for our body.

• Nutrition: Nutrition is the process by which living organisms obtain and utilize food for growth,energy,and maintaining bodily functions. It involves taking in food, breaking it down, absorbing nutrients and using those nutrients to support life.

• Parasite: A parasite is an organism live on or inside another organism ( the host ) and obtains nutrients and shelter from it, often harming the host in the process. Essentially, parasites rely on their host for survival,while the host may suffer as a result.

• Photosynthesis: Photosynthesis is the process by which green plants make their own food using sunlight,water and carbon dioxide. It occurs in the leaves of plant, specifically in the chloroplasts, which contain chlorophyll. The process converts light energy into chemical energy, producing glucose (a type of sugar) and oxygen.

• Saprotrophs: Saprotrophs are organisms that obtain nutrients by feeding on dead and decaying matter. They are also known as decomposers, and they play a vital role in ecosystem by breaking down dead plants and animals and releasing nutrients back into the environment. Examples of saprotrophs include certain types of fungi (like mushrooms) and bacteria.

• Saprotrophic: The mode of nutrition in which organisms take in nutrition from dead and decaying matter is called saprotrophic nutrition.

• Stomata:  The pores present on the surface of leaves is surrounded by 'guard cells' such pores are called stomata.