Define a taxon. Give some examples of taxa at different hierarchical levels.
What are the steps involved in formation of a root nodule?
Describe the process of digestion of protein in stomach.
Multicellular organisms have division of labour. Explain.
New cells generate from (a) bacterial fermentation (b) regeneration of old cells (c) pre-existing cells (d) abiotic materials
Discuss the main steps in the digestion of proteins as the food passes through different parts of the alimentary canal.
Describe the role of liver, lungs and skin in excretion.