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Zoo111:Basic Zoology Ii Question Paper

Zoo111:Basic Zoology Ii

Course:Basic Zoology Ii

Institution: University Of Eldoret question papers

Exam Year:2010

Answer any ten questions.Each question carries 7marks.
1.a)Define the following:
i.Lithosphere
ii.Biogeographical region
iii.Habitat (3marks)
b)State and explain two types of
i.Niches
ii.Ecological studies (4marks)
2.a)State how background,relative humidity and temperature affect distribution of animals (3marks)
b)List four edaphic factors that affect the distribution of animals.(4marks)
3.a)Besides parasitism list and define three types of interactions between organisms in an ecosystem.(3marks)
b)Distinguish between
i)Photoperiodism and productivity
ii)Fecundity and gestation period (4marks)
4.Define the following terms
a)Allele
b)Homozygous
c)Recessive
d)Locus
e)Backcross(testcross)
f)Genetics (7marks)
5.a)Define:
i)Evolution
ii)Species
iii)Population (3marks)
b)Outline four evidences of evolution.(4marks)
6.a)State Mendel''s law of segregation (1mark)
b)In guinea pigs,rough coat(R) is dominant over smooth coat (r) and black coat (B) is dominant over white coat(b).If a homozygous rough black is mated with a homozygous smooth white,give the appearance of each of the following:
i)F1
ii)F2
iii)Offspring of F1 mated with smooth white parent
iv)Offspring of F1 mated with rough,black parent.(6marks)
7.a)Describe the structure of the 70S-ribosome stating clearly what the 70S stand for(5marks)
b)What is GERL complex (2marks)
8.a)State five functions of epithelial tissues(5marks)
b)With reference to the pancreas distinguish between endocrine and exocrine glands (2marks)
9.Describe intracellular digestion of carbohydrates,proteins and nucleic acids in a named mammal (7marks)
10.a)Cellular respiration is the oxidative breakdown of glucose to yield 36 ATP molecules.Draw a diagram to illustrate and verify the above statement.(5marks)
b)Explain the significance of each of each of the following:
i)Capacitation
ii)Cortical reaction (2marks)
11.a)Draw a diagram of the mammalian nephron and indicate where the following processes occur:
i)Glomerular filtration
ii)Tubular reabsorption
iii)Tubular secretion (4marks)
b)State three differences between mass flow and diffusion (3marks)
12.Describe the homeostatic control of temperature.(7marks)

Zoo111:Basic Zoology Ii Question Paper

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