Write what do phytophagous insects feed on.

(a) Name the following: The semi-dwarf variety of wheat is high-yielding and disease-resistant.

(b) Name the following: Any one inter-specific hybrid mammal.

Write the similarity between the wing of a butterfly and the wing of a bat. What do you infer from the above with reference to evolution?

(a) Highlight the role of thymus as a lymphoid organ.

(b) Name the cells that are released from the above-mentioned gland. Mention how they help in immunity.

Why do clown fish and sea anemone pair up? What is this relationship called?