1. Give three reasons why amphioxus is considered to be chordate
2. Give the taxonomic classes of the following groups of fishes
a) Hag fishes and lamprey:
b) Sharks and rays:
c) Perches and trout:
3. Give three adaptations that make sharks vicious marine predators
4. State three functions of the mucous found on the epidermis of the fish skin
5. Give three evolutionarily important features of primitive fishes in the genus Latimeria.
6. State three primary functions of the swim bladder in ray- finned fishes
7. Giving one fish example, briefly explain the meaning of the following terms
a) Aestivation
b) Anadromous
c) Catadromous
8. State three feature that enable the amphibian skin to perform the following functions
a) Respiration
b) Camouflage
c) Osmoregulation
9. Give three principal causes of the global decline amphibian populations
10. Explain how amphibians solved the following problems during the colonization of the terrestrial environment
a) Water conservation
b) Use of atmospheric oxygen
c) Fluctuation in air temperature
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