Q. 2
Discuss the life cycle of late blight of potato. Discuss its epidemics, disease forecast and control.
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FPSC · CSS 2020
Botany
This paper
Botany · all yearsQ. 2 · Discuss the life cycle of…Q. 3 · Write a note on sporophyte…Q. 4 · Write down the discovery, chemical…Q. 5 · Describe nitrogen cycles between the…Q. 6 · How Morgan and his students…Q. 7 · Differentiate between plasmid and vector.…Q. 8 · Write down a comprehensive notes…With this paper← 20192021 →3 hours · questions hide until you reveal them
Part II
Q. 3
Write a note on sporophyte of Pinus . Compare reproductive characteristics of Pinus with Selaginella .
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Q. 4
Write down the discovery, chemical structure, and role of gibberellins in regulating various physiological processes in plants.
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Q. 5
Describe nitrogen cycles between the abiotic environment and organisms. Briefly describe how human activities have changed global nitrogen budget.
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Q. 6
How Morgan and his students demonstrated that gene was linked in fruit flies? How linkage is related to some events in meiosis?
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Q. 7
Differentiate between plasmid and vector. Briefly explain bacteriophage lambda (λ) vector. Describe its working and selection process.
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Q. 8
Write down a comprehensive notes on any TWO of the followings:
- (a)The four components of taxonomy.
- (b)Distribution of gymnosperms in Pakistan.
- (c)Differences in vascular system of stem of monocot and dicot plants.
(20)
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About this paper
The 2020 CSS Botany paper set by the FPSC. Question wording only; questions marked “Not yet checked” have not been compared with the official paper yet.
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