CSS past paper

CSS Botany Past Paper 2026

CSS Botany 2026 carries 100 marks over 3 hours. It has 7 questions.

Years

How to attempt: Attempt ONLY FOUR questions from PART-II. ALL questions carry EQUAL marks.

Question 1 (Part I) is the paper's MCQs, which are not reproduced here.

Q. 2
Explain evidences in support of evolution from conventional and molecular biology.
(20)
Q. 3
Discuss biological and economic importance of fungi.
(20)
Q. 4
How would you prove that replication of DNA is semiconservative?
(20)
Q. 5
Explain Mendel’s Law of Segregation and Law of Independent Assortment. Is law of Independent Assortment applicable to codominant genes and the genes present on the same chromosome?
(20)
Q. 6
Explain structure and reproduction of Spirogyra.
(20)
Q. 7
Explain molecular structure of cell membrane.
(20)
Q. 8
Write short note on any FOUR of the following:- (5 each)
(20)
- (a)
  Micro and megasporogenesis in angiosperms
  (5)
- (b)
  Ecosystem
  (5)
- (c)
  Plant hormones
  (5)
- (d)
  Air pollution
  (5)
- (e)
  Gymnosperms
  (5)

Part-II is to be attempted on the separate Answer Book.
Attempt ONLY FOUR questions from PART-II. ALL questions carry EQUAL marks.
All the parts (if any) of each Question must be attempted at one place instead of at different places.
Write Q. No. in the Answer Book in accordance with Q. No. in the Q.Paper.
No Page/Space be left blank between the answers. All the blank pages of Answer Book must be crossed.
Extra attempt of any question or any part of the question will not be considered.