Life Processes – Notes
The process that helps in carrying out metabolic functions of living organisms are called life processes.
The process of obtaining energy from food is called nutrition.
Preparation of organic compounds from inorganic substances is called autotrophic nutrition.
Heterotrophs depend on autotrophs for nutrition.
The process of fixation of atmospheric carbon dioxide into carbohydrate in the presence of water, sunlight and chlorophyll is known as photosynthesis.
Photosynthesis involves a series of photochemical reactions that consists of two phases: Light and Dark reactions.
Light reaction takes place in the thylakoids of the chloroplast of the leaves.
Dark reaction takes place in the stroma of the chloroplast.
Leaves have small pores called stomata for gaseous exchange.