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Biology Question Paper

Biology

Course:Biology

Exam Year:2014

REVISION ESSAYS QUESTIONS.
1.Explain how the mammalian skin is adapted to perform its function.(20mks)
2.Explain how the following abiotic factors affect the distribution of organisms in an ecosystem.
a) Light.
b)Temperature.
c)Salinity.
d)Rainfall.(20mks)
3.Discuss the various evidences which show that evolution has taken place.(20mks)2
4.Explain how the mammalian intestines are adapted to perform their functions.(20mks)
5.Describe how the female reproductive system is adapted to its function.(20mks)
6.a)Explain the necessity of support is achieved in flowering plants.(8mks)
b)Describe various ways in which support is achieved in flowering plants(20mks)
7.a)What is meant by natural selection?(3mks)
b)Describe how natural selection brings about adaptation of a species to its environment(17mks)
8.Explain how seeds and fruits are adapted to the various methods of dispersal.(20mks)
9.a)What is meant by the terms?
¡)Excreation (2mks)
¡¡)Secretion. (2mks)
¡¡¡)Digestion. (2mks)
b)Describe the formation and removal of urea from the human body(14mks)
10.Describe the;
a)Process of inhalation in mammals (10mks)
b)Mechanism of opening and closing of stomata in plants.(10mks)
11.Explain how the various activities of man have caused air pollution(20mks)
12.a)Discuss the characteristic of symbiotic,saprophytic and parasitic nutritional relationships.(14mks)
b)What is the economic importance of these feeding relationship to man.(6mks)
13.Describe how the male reproductive system is adapted to performing its function.(20mks)
14.Explain with an example the following terms as used in the study of evolution.
a)Adaptive radiation (5mks)
b)convergent evolution (5mks)
15.Describe how biotic and abiotic factors regulate polution growth in an ecosystem.(20mks)
16.Explain how the mammalian blood is adapted to perform its functions.(20mks)
17.Describe the digestion process of a small piece of ugali from the mouth until the final digestion and absorption into the bloodstream (20mks)
18.Relate the stracture of the mammalian ear to its hearing function. (20mks)
19,a)What is a reflex action? (2mks)
b)With the aid of a large labeled diagram,show the future of a reflex action of a vertebrate (10mks)
c)Describe how a reflex arc functions.(8mks)
20.Describe how the mammalian kidney functions.(20mks)

Biology Question Paper

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