ai. What are sense organs?

ii. Name three sense organs that respond to the stimulus of chemicals

b. List three animals each that exhibit the following courtship behaviours
i.territoriality ii. pairing

ci. State one similarity between the eggs of toad and the eggs of birds.

ii. State three differences between the eggs of toads and the eggs of birds.

d. Complete the table below by listing four organisms involved in the nitrogen cycle and state one role each of the organisms.

four organisms involved in nitrogen circle

one role of organism

e. Complete the table below by naming two types of heterotrophic modes of nutrition in animals and give two examples each of the organisms that carry out the modes of nutrition.   

Two modes of heterotrophic nutrition

Two examples of organisms that carry out mode of nutrition