Botany 2017

COMPETITIVE EXAMINATION-2017

FOR RECRUITMENT TO POSTS IN BS-17

UNDER THE FEDERAL GOVERNMENT

BOTANY

TIME ALLOWED: THREE HOURS

PART-I(MCQS): MAXIMUM 30 MINUTES

PART-I (MCQS)

PART-II

MAXIMUM MARKS = 20

MAXIMUM MARKS = 80

NOTE:

(i) Part-II is to be attempted on the separate Answer Book.

(ii) Attempt ONLY FOUR questions from PART-II. ALL questions carry EQUAL marks.

(iii) All the parts (if any) of each Question must be attempted at one place instead of at different

places.

(iv) Candidate must write Q. No. in the Answer Book in accordance with Q. No. in the Q.Paper.

(v) No Page/Space be left blank between the answers. All the blank pages of Answer Book must

be crossed.

(vi) Extra attempt of any question or any part of the attempted question will not be considered.

PART-II

Q. No. 2. Describe briefly habitat, structure, reproduction and life cycle of adiantum.

(20)

Q. No. 3. Discuss evolution of seed and its importance in vascular plants.

(20)

Q. No. 4. Why is Darwin's theory of evolution still so controversial? Explain.

(20)

Q. No. 5. How does the C4 pathway differ from C3 pathway of carbon fixation? What are the

advantages and disadvantage of each pathway?

(20)

Q. No. 6. How did the discovery that the DNA molecule is helical with uniform 2-mm diameter

lead Watson and crick to propose the pairing rules for double-helix model? Explain.

(20)

Q. No. 7. Describe causes and reclamation of soil salinity and water logging in Pakistan.

(20)

Q. No. 8. Writer short notes on any FOUR of the following:

(5 each)

(20)

(a)

Forensic Palynology.

(b)

Chemo taxonomy.

(c)

Imperfect Fungi.

(d)

Choromosomal aberrations.

(e)

Economic importance of Acacia Family.