KHYBER PAKHTUNKHWA PUBLIC SERVICE COMMISSION
COMPETITIVE EXAMINATION FOR THE POSTS OF PMS -2022
BOTANY PAPER-II
Time Allowed: 03 Hours Maximum Marks: 100
Note: Attempt any five questions. Each question carries 20 marks.
Q 1 What is transpiration? Why it is important for plants? Describe the different types and mechanisms of transpiration. 20
Q 2 Describe different plant hormones (plant growth regulators) along with their functions in plants, and applications in agriculture and horticulture. 20
Q 3 Define and describe photoperiodism, vernalization, dormancy, and seed germination. 20
Q 4 Differentiate between the terms “food chain”, “food web” with clear examples as well as explain trophic levels with focus on energy flow in the ecosystem. 20
Q 5 Describe salinity and water logging, their causes and consequences with special reference to Pakistan. 20
Q 6 Describe the ultra-structures and functions of five most important cell organelles. 20
Q 7 Write a comprehensive note on Mendel’s findings in genetics. Also describe crossing over, genetic code and biochemical structure of hereditary material. 20
Q 8 Write a detailed note on the journey of Darwin that led to his theory of natural selection with remarks on the challenges faced by Neo-Darwinism. 20