Class 12 Biology MCQ Chapter 13 Organisms and Populations

Class 12 Biology MCQ Chapter 13 Organisms and Populations Solutions English Medium to each chapter is provided in the list so that you can easily browse through different chapters Class 12 Biology MCQ Chapter 13 Organisms and Populations Question Answer in English and select need one. AHSEC Class 12 Biology Objective Type Question Answer As Per AHSEC New Book Syllabus Download PDF. AHSEC Biology MCQ Class 12 Solutions.

Class 12 Biology MCQ Chapter 13 Organisms and Populations

Also, you can read the NCERT book online in these sections Solutions by Expert Teachers as per Central Board of Secondary Education (CBSE) Book guidelines. AHSEC Class 12 Biology Multiple Choice Solutions in English Medium are part of All Subject Solutions. Here we have given AHSEC Class 12 Biology MCQ Question Answer English Medium for All Chapters, You can practice these here.

Organisms and Populations

Chapter: 13

MCQs

Choose the Correct Option:

1. Ecology is the study of interactions between organisms and their:

(a) Evolution.

(b) Environment.

(c) Cells.

(d) DNA.

Ans: (b) Environment.

2. Which of the following is not a level of ecological organization?

(a) Organism.

(b) Chromosome.

(c) Population.

(d) Biome.

Ans: (b) Chromosome.

3. Population ecology links ecology to:

(a) Genetics and physiology.

(b) Molecular biology and evolution.

(c) Population genetics and evolution.

(d) Anatomy and biochemistry.

Ans: (c) Population genetics and evolution.

4. Population density is technically represented as:

(a) K

(b) r

(c) N

(d) P

Ans: (c) N.

5. Sex ratio is the ratio of:

(a) Old to young.

(b) Male to female.

(c) Female to male.

(d) Adult to juvenile.

Ans: (c) Female to male.

6. Age pyramids represent:

(a) Biomass changes.

(b) Nutrient cycling.

(c) Age distribution in population.

(d) Trophic levels.

Ans: (c) Age distribution in population.

7. Immigration increases:

(a) Birth rate.

(b) Death rate.

(c) Population density.

(d) Emigration.

Ans: (c) Population density.

8. Exponential population growth results in:

(a) S-shaped curve.

(b) Zigzag curve.

(c) J-shaped curve.

(d) Flat line.

Ans: (c) J-shaped curve.

9. Carrying capacity (K) is the:

(a) Maximum size a population can attain.

(b) Population birth rate.

(c) Average number of deaths.

(d) Minimum survivable population.

Ans: (a) Maximum size a population can attain.

10. Bamboo flowers once in its lifetime. This is called:

(a) Iteroparity.

(b) Semelparity.

(c) Logistic strategy.

(d) Viviparity.

Ans: (b) Semelparity.

11. Two species competing for the same resources exhibit:

(a) Mutualism.

(b) Commensalism.

(c) Competition.

(d) Amensalism.

Ans: (c) Competition.

12. Which interaction benefits both species?

(a) Mutualism.

(b) Parasitism.

(c) Predation.

(d) Amensalism.

Ans: (a) Mutualism.

13. Predators control prey populations and help in:

(a) Pollination.

(b) Increasing prey growth.

(c) Maintaining diversity.

(d) Decomposition.

Ans: (c) Maintaining diversity.

14. The ‘Competitive Exclusion Principle’ was proposed by:

(a) Verhulst.

(b) Gause.

(c) Darwin.

(d) Connell.

Ans: (b) Gause.

15. In brood parasitism, one bird lays eggs in:

(a) Predator’s nest.

(b) Host’s nest.

(c) Its own nest.

(d) Underground.

Ans: (b) Host’s nest.