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Zool 310: Developmental Biology Y4s1 Question Paper

Zool 310: Developmental Biology Y4s1 

Course:Bachelor Of Environmental Science

Institution: Kabarak University question papers

Exam Year:2009



INSTRUCTIONS:
Answer All questions from Section A and Any TWO questions from Section B
PLEASE TURN OVERSECTION A (40 MKS)
1. Write explanatory notes on the following;
(i) Regeneration
(ii) Senescence
(iii) Growth (6mks)
2. (a) Compare and contrast the processes of meiosis and mitosis. (8mks)
(b) Explain the two processes that occur immediately after fertilization in order to
prevent polyspermy. (4mks)
3. Explain using appropriate examples, how a single protein (e.g. villin) can drastically
alter the shape of a cell. (6mks)
4. Differentiate between gastrulation and blastula formation. (8mks)
5. Explain with reference to the disposable soma theory, the genetic control in the
process of aging. (8mks)
SECTION B (30 MKS)
6. Discuss with the aid of diagrams, regeneration in Hydra.
(15 mks)
7. Discuss, exhaustively, the post-embryonic growth strategies.
(15 mks)
8. Discuss the process of gastrulation in Echinoderms.
(15 mks)




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