LIFE SCIENCE

Detailed explanation-1: -Most life on Earth depends on photosynthesis. The process is carried out by plants, algae, and some types of bacteria, which capture energy from sunlight to produce oxygen (O2) and chemical energy stored in glucose (a sugar).

Detailed explanation-2: -They need two key gases: oxygen is used in aerobic respiration, where food molecules are broken down to release energy for growth. This process releases carbon dioxide as a waste product. carbon dioxide is used in photosynthesis, where the sun’s energy is harnessed to make food.

Detailed explanation-3: -Plants do require oxygen for respiration which in return gives out carbon dioxide. Unlike animals, plants do not have any specialized structures for gaseous exchange but they have stomata (present in leaves) and lenticels (present in stems) which are involved in the exchange of gases.