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PSF602S - PLANT STRUCTURE AND FUNCTION - 1ST OPP - NOVEMBER 2024 |
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nAmtBIA untVERSITY
OF SCIEnCE AnDTECHnOLOGY
FacultyofHealthN, atural
ResourceasndApplied
Sciences
Schoolof NaturalandApplied
Sciences
Departmentof Biology,
Chemistryand Physics
13JacksonKaujeuaStreet T: +264612072012
Private Bag13388
F: +264612079012
Windhoek
E: dbcp@nust.na
NAMIBIA
W: www.nust.na
QUALIFICATION : BACHELOROF SCIENCE
QUALIFICATION CODE: 07BOSC
LEVEL: 6
COURSE: PLANTSTRUCTUREAND FUNCTION
COURSECODE: PSF602S
DATE: NOVEMBER 2024
SESSION: 1
DURATION: 3 HOURS
MARKS: 100
FIRSTOPPORTUNITY:QUESTION PAPER
EXAMINER:
MODERATOR:
DR JEYAKENNEDY
PROFPERCYCHIMWAMUROMBE
INSTRUCTIONS:
1. Answer all questions on the separate answer sheet.
2. Please write neatly and legibly.
3. Do not use the left side margin of the exam paper. This must be allowed for the
examiner.
4. No books, notes and other additional aids are allowed.
5. Mark all answers clearly with their respective question numbers.
PERMISSIBLEMATERIALS:
1. Non-Programmable Calculator
ATTACHEMENTS
1. None
This paper consistsof 3 pages including this front page
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SECTION A:
.
SHORT
ANSWER
QU-ESTIONS
Please answer ALL of the questions in this section.
The number of marks is given in brackets() at the end of each question
QUESTION 1: SHORT QUESTIONS
[27 MARKS]
1.1 Define idioblasts.
{1)
1.2 Name the chemical secreted by plants in partnership with mycorrhizal fungi and
rhizobia bacteria.
(2)
1.3 Distinguish between scarification and stratification.
{2)
1.4 Mention the types of photoreceptors in plants.
(2)
1.5 Distinguish between sink and source.
(2)
1.6 What is the role of Nicotiana attenuata, a species of wild tobacco, in response to
mechanical damage caused by herbivores, and how does this alteration in the
plant's physiology serves as a deterrent against future herbivore attacks?
(4)
1.7 The given figure 1 below represents a typical root structure. What type of root
and mention its functions.
(4)
(a)
(b)
Fig 1
1.8 Provide the correct term for the following statements:
(5)
(a) The formation of a new generation of plants from one parent only.
(b) The swollen underground stem of a potato.
(c) The joining of two compatible plants so that the tissues of the two plants
grow or merge together.
(d) Only takes a few cells and are grown in a lab situation
(e) A stem section that contains some node is cut and placed in soil
1.9 In tabular form, distinguish between racemose and cymose inflorescence, and give an
example for each.
(5)
PLANTSTRUCTUREAND FUNCTION(PSF602S)
ist Opportunity November 2024
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,SECTIONB: LONGANSWER QUESTIONS
QUESTION2: LONGERQUESTIONS
[43 MARKS]
2.1 Discuss how flowers are classified according to the sexes categories.
(6)
2.2 In tabular form, distinguish between dicot and monocot seeds, providing one
example of each.
(6)
2.3 Describe the rapid response of the Venus flytrap to the stimulation of hairs on the
lobes of its modified leaves and explain how the trap's closure is achieved.
(6)
2.4 Describe the structure of a pollen wall and provide a well-labelled diagram.
(7)
2.5 With neat, labelled diagram, describe the parts of a typical angiospermic
megasporangium.
(8)
2.6 Explain how fruits are classified based on the nature of the pericarp and the
number of carpels? Provide one example for each classification.
(10)
!SECTIONC: ESSAYQUES
-
-
'
Please answer ANY TWO of the questions in this section C.
QUESTION 3:
3.1 Describe the structure of the stomata with a labelled diagram and explain the
mechanism of stomata! closure.
(15)
3.2 Early angiosperm embryos undergo a series of developmental changes as a seed
matures. Explain this sequence of embryogenesis in eudicots.
(15)
3.3 With a neat cellular diagram, explain the anatomy of dicot root.
(15)
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END OF QUESTION PAPER
PLANTSTRUCTUREAND FUNCTION(PSF602S)
ist Opportunity November 2024
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