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Ecophysiology Question Paper

Ecophysiology

Course:Bachelor Of Education Science

Institution: Kenyatta University question papers

Exam Year:2008

KENYATTA UNIVERSITY
UNIVERSITY EXAMINATIONS 2007/2008
INSTITUTE OF OPEN LEARNING

SPECIAL/SUPPLMENTARY EXAMINATION FOR THE DEGREE OF
BACHELOR OF EDUCATION (SCIENCE)
SBT 403: ECOPHYSIOLOGY

DATE: Tuesday 7th October 2008

TIME: 8.00am-10.00am

INSTRUCTIONS
Answer ALL questions in Section A and ANY ONE in section B. Answers in Section A
should be concise and written in the spaces provided in the question paper.

SECTION A: Short answer questions (5 marks each)
1.
Give brief description of the components of leaf diffusive resistance.
2.
What are the stages of germination?
3.
Discuss briefly the effects of solar energy on plants.
4.
Briefly describe the major characteristics that distinguish the C3 and C4 pathways of photosynthesis.
5.
Briefly discuss the cost to the pants of overcoming adverse environmental effects.
6.
Give a brief account of photosynthesis-transpiration dilemma.
7.
Describe briefly the factors that stimulate photorespiration.
8.
With the aid of a diagram describe the hormonal changes that occur in a dormant seed subjected to low temperature.

SECTION B: Essay (30 marks)
1.
Discuss the factors that impose seed dormancy.
2.
Write an essay on the mechanism of drought resistance exhibited by plans in arid habitant.
3.
Energy into a leaf equals energy out of a leaf. Discuss