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FPSC · CSS 2021

Botany

100 marks · 3 hours · 7 questions
This paper Botany · all yearsQ. 2 · Cynophyta (Blue green algae) is…Q. 3 · What are the physiological roles…Q. 4 · What is the specificity of…Q. 5 · Differentiate between Vascular cambium and…Q. 6 · Write a note on cell…Q. 7 · How are Gametophyte and Sporophyte…Q. 8 · Write a note on any…With this paper← 20202023 →
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Part II

Q. 2

Cynophyta (Blue green algae) is a main group of algae. What is the economic importance of this particular group in particular group in food and hunger? Illustrate your answer with examples?

(20)
Q. 3

What are the physiological roles of Cytokinins and Abscisic Acid in plant growth?

(20)
Q. 4

What is the specificity of enzyme action? Explain it with reference to the important enzyme “Ribulose-1, 5-Bisphosphate Carboxylase-Oxygenase” (RuBisCO).

(20)
Q. 5

Differentiate between Vascular cambium and Cork cambium. Describe their role in secondary growth.

(20)
Q. 6

Write a note on cell senescence and cell death.

(20)
Q. 7

How are Gametophyte and Sporophyte evolved in Bryophytes?

(20)
Q. 8

Write a note on any TWO of the followings:

  1. (a)Hardy – Weinberg’s Law [10]
  2. (b)Evidences of Evolution [10]
  3. (c)Theory of Natural Selection [10]
(20)

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About this paper

The 2021 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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