Question: What is nutrition?
Answer: The process of taking in food by an organism and its utilization by the body is called nutrition. There are two types of nutrition:
- The mode of nutrition in which organisms make food themselves from simple substances is called autotrophic nutrition. For example plants.
- The mode of nutrition in which organisms take in ready made food prepared by the plants called heterotrophic nutrition. For example animals
Question: What are ‘stomata’? Where are thy normally found?
Answer: Leaves take in carbon dioxide from the air through tiny poses called stomata. These poses are located on the underside of the leaves.
Question: Write down the chemical equation for manufacture of food in green plants.
Answer: Carbon dioxide+Water Chlorophil / sunlite Glucose+Oxygen.
Question: What factors are essential for photosynthesis to take place?
Answer: The factors that are essential for photosynthesis are water and chlorophyll, Carbon dioxide, sunlight.
Questiona: How does an insectivorus plant absorb nutrients from an insect trapped by it?
Answer: An insectivorus plant absorb nutrients from an insect by the calls of the plant secrete digestive juices to digest the insect.
Question: Why are Nitrogenous fertilizers not added in soil in which leguminous plants are grown?
Answer: Nitrogenous fertilizers are not added in soil in which leguminous plants are grown because a bacteria Rhizobium can take atmospheric Nitrogen and convert it into a soluble form that the plants can absorb.
Question: Differentiate between Autotrophs and Heterotrophs, giving two examples of each.
Answer: Difference between autotrophs and heterotrophs is as follows: