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Biology for Advanced Level Secondary Schools
Revision exercise 7 7. During your long vacation
1. Weather varies throughout the villagers have been informed
year. How do mammals survive about your presence and they have
in such drastic weather changes? requested you to educate them
in a village meeting on urinary
FOR ONLINE READING ONLY
2. With a specific example of a system disorders in human.
homeostatic mechanism, describe Prepare an outline presentation
how a body can balance its for the following disorder:
contents through negative feedback
mechanism. (a) Kidney failure,
(b) Kidney stones, and
3. How do endotherms keep their
body temperatures constant? (c) Diabetes insipidus
8. Imagine you are a marine
4. Outline the ways by which biologist and your friend ask you
mammals are adapted to arid and to explain how elasmobranches
semi- arid conditions.
maintain the balance of salts and
5. Urea formation is an inevitable water in their bodies. How would
process in mammals as it enables you help her?
them to get rid of excess amino
acids from the body tissues. 9. Your young brother has been
How does this process occur in assigned to describe the
mammalian bodies? mechanism of osmoregulation
in mammals in classroom
6. Imagine you are a pastoralist presentation. How would
living in the environment where you assist him preparing his
water is plenty and you have sold presentation?
your cattle to a person living 10. How would you convince
where there is light scarcity your fellow students who
of water. Explain the adaptive totally oppose the fact that the
mechanisms that cattle will mechanism of osmoregulation is
undergo to survive in the new solely depending upon hormonal
environment.
control?
Project
Select an area of your interest related to Biology then, design and conduct a project.
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