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Bota 322: Plant Growth And Development Question Paper

Bota 322: Plant Growth And Development

Course:Bachelor Of Science

Institution: Egerton University question papers

Exam Year:2010

SECTION A: ANSWER ALL QUESTIONS

1.(a) Define the following terms: (4 Marks)
i. Growth
ii. Juvenility
iii. Maturation
iv. Senescence
(b) Differentiate between the following: (4 Marks)
i. Monocarpic and polycaroic species
ii. Determinate and indeterminate plant structures
2.(a) List three types of female gametophytes. (3 Marks)
(b) What is fertilization? (1 Mark)
(c) List two factors that affect the rate of pollen tube growth. (2 Marks)
(d) What are the abnormalities experienced by a plant due to presence of extra sperms in the endosperm. (2 Marks)
3.(a) Define polyembryo and list two types of polyembryo in angiosperms. (3 Marks)
(b) State types of apmoxis. (3 Marks)
4. Using an appropriate illustration, show cells and nuclei in an embryo sac. (5 Marks)
5.(a) Explain what you understand by the term double fertilization and what are its significance in angiosperms. (5 Marks)
(b) Name four changes that occur after fertilization in a flowering plant. (4 Marks)
6. Explain the effects of the following phytohormones in flowering process. (6 Marks)
a. Gibberellins
b. Cytokinins
c. Auxins

SECTION B: ANSWER TWO QUESTIONS ONLY

7. Explain the physiology of flowering plants. (15 Marks)
8. Explain juvenility, maturation and senescence in plants. (15 Marks)
9. With the help of a diagram, show modular construction of a shoot apex. (15 Marks)

Bota 322: Plant Growth And Development Question Paper

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