(a) Generally, light is not a limiting factor. It becomes a limiting factor for plants growing in shade or under tree canopies. In the given graph, light is a limiting factor at the point where photosynthesis is the minimum. The least value for photosynthesis is in region A. Hence, light is a limiting factor in this region.
(b) Light is a limiting factor in region A. Water, temperature, and the concentration of carbon dioxide could also be limiting factors in this region.
(c) Point D represents the optimum point and gives the light intensity at which the maximum photosynthesis is recorded. The rate of photosynthesis remains constant after this point, even though the intensity of light increases in region C.
Define a taxon. Give some examples of taxa at different hierarchical levels.
What are the steps involved in formation of a root nodule?
Define a taxon. Give some examples of taxa at different hierarchical levels.
Describe the process of digestion of protein in stomach.
Multicellular organisms have division of labour. Explain.
Describe the role of liver, lungs and skin in excretion.
Discuss the main steps in the digestion of proteins as the food passes through different parts of the alimentary canal.
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NCERT page no 221 please give the answers