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PTP610S - PLANT PHYSIOLOGY - 1st Opp - JUNE 2022 |
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nAmlBIA unlVERSITY
0F SCIEnCEAno TECHn OLOGY
FACULTYOF HEALTH,APPLIEDSCIENCESAND NATURALRESOURCES
DEPARTMENTOF AGRICULTUREAND NATURALRESOURCESSCIENCES
QUALIFICATION: BACHELOR OF SCIENCE IN HORTICULTURE
QUALIFICATION CODE:07BHOR
LEVEL:6
COURSE:PLANT PHYSIOLOGY
COURSECODE: PTP610S
DATE: JUNE 2022
SESSION:JUNE
DURATION: 3 HOURS
MARKS: 100
FIRSTOPPORTUNITYEXAMINATION QUESTION PAPER
EXAMINER(S) DR GRACEN. KANGUEEHI
MODERATOR: PROFTHEO WASSENAAR
THIS QUESTION PAPERCONSISTSOF 1 PAGES
(Excluding this front page)
INSTRUCTIONS
1. Answer ALL the questions.
2. Write clearly and neatly.
3. Number the answers clearly.
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QUESTION 1
1.1 What is the difference between angiosperms and gymnosperms?
(2)
1.2 Explain what is meant by differentiation, and give an example.
(2)
1.3 Discuss the nitrate reduction process.
(3)
1.4 What is phytochrome (Pfr) and why is Pfr important to plants?
(3)
1.5 Differentiate between a plant cell and an animal cell, by listing the main difference
between the two cells.
(3)
[13]
QUESTION 2
2.1 Distinguish between the Symplastic, Transmembrane and the Apoplastic pathways. (6)
2.2 How does soil pH affect nutrient availability, soil microbes, and root growth?
(6)
2.3 Define and then discuss the three (3) active transport processes in a plant.
(6)
2.4 Define photoperiodism and describe its three (3) form.
(7)
2.5 List four (4) plant growth hormones and describe their functions.
(8)
[33]
QUESTION 3
3.1 Explain how photosynthates are transported in plants.
(10)
3.2 Water deficit can have a negative impact on plant growth. In your own words, discuss the
morphological, physiological, biochemical and growth responses of plants to drought stress.
(12)
3.3 Define the cohesion-tension theory and describe how water potential, evapotranspiration,
and stomata I regulation influences transportation of water in plants.
(14)
3.4 Give an example of a C3, C4, and CAM plants and differentiate between their
photosynthetic pathways.
(18)
[54]
Final Marks: 100
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