Name the type of accessory respiratory organ in each of the following fishes:

i) Amphipnous

ii) Anabas

iii) Ophiocephalus

iv) Saccobranchus

v) Clarias

Describe the specialized sensory organs in fish and snakes.

Give one example each of protective, warning, alluring and conscious mimicry and mention the purpose for mimicry in each case.

Discuss echolocation in bats.

Briefly describe the structure and functions of adrenal cortex and medulla.

Explain migration in fishes

Define “Fixed Action Pattern” (FAP) and give its two suitable examples.