Ecological Principles MCQ - Attempt Quiz Here!

By Renuka Miglani|Updated : August 5th, 2022

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Multiple Choice Questions On Ecological Principles 

Question 1. 

In the context of diversity patterns of species, which one of the following statements is INCORRECT?
  1. Alpha diversity is diversity within a single community
  2. Beta diversity is a measure of the change in species composition from one community or habitat to another
  3. Alpha diversity is the regional diversity found among a range of communities in a geographical region
  4. Gamma diversity is the regional diversity found among a range of communities/habitats in a geographical region

Question 2. 

A species whose life history strategies allow for high intrinsic rates of increase (r-strategist) will also exhibit the following EXCEPT
  1. high tolerance for both environmental instability and low-quality resources.
  2. the short period of exponential population growth (r)
  3. the reproductive strategy that involves random mating, semelparity and little or no parental investment
  4. survivorship that shows density-dependent mortality, typically exhibiting Type 1 or 2 survivorship curves.

Question 3. 

Given below is an ecological pyramid.



The above pyramid represents:

  1. Pyramid of number of a parasitic food chain and pyramid of biomass of a pond ecosystem
  2. Pyramid of number of a pond ecosystem and pyramid of biomass of a forest ecosystem
  3. Pyramid of energy of grassland and pyramid of biomass of an open ocean ecosystem
  4. Pyramid of biomass of grassland and pyramid of number of a tropical forest ecosystem

Question 4.

The rank/abundance plot given below illustrates three well known species abundance curves (a, b, c).


Based on the shapes of the curves select the correct option.

  1. a-exponential, b-log normal, c-geometric series
  2. a-broken stick, b-geometric series, c-log normal
  3. a-broken stick, b-log normal, c-geometric series
  4. a-exponential, b-geometric series, c-log normal

Question 5. 

Three species M, N and O when grown independently in a laboratory showed typical logistic growth curves. However, when grown in pairs, the following growth curves were observed.



What interpretation regarding the interspecific relationship between M, N and O can be deduced from the above observations?

  1. N predates over O and therefore can also predate on M.
  2. N is competed out by M and O.
  3. N and O possibly have a prey-predator relationship.
  4. M and O exhibit a prey-predator relationship.

Question 6. 

The Western honey bee (Apis mellifera) collects both nectar and pollen from flowers. The following are a few hypotheses proposed to explain this behaviour in Amellifera:

(A) In the past, those individuals that fed on both nectar and pollen left more descendants than those who preferred either nectar or pollen

(B) The sensory stimulus from taste receptors in the honey bees leads to positive reinforcement to look for more of the same food

(C) The honey bee's nervous system is predisposed to like the sweet taste

(D) The ancestor of the honey bee was dependent on some sugar and protein-rich diet and the honey bees have inherited the same taste perception

Which of the following combinations of ultimate hypotheses best explains the bee's feeding behaviour?

  1. a and b 
  2. b and c
  3. a and d
  4. D and b

Question 7. 

The net reproductive rate (R0) is 1.5 for a given population. If Nt, the population of females at generation t, is 500, then what will be the population of females after four generations (Nt+4)?

  1. 1125.000
  2. 2531.250
  3. 1265.625
  4. 3796.875
Question 8.

Match the following descriptions to their respective terrestrial biomes.

A) Savanna Biomes

B) Tropical Forest Biomes

C) Grassland Biomes

D) Desert Biomes

(i) Has the highest biodiversity and primary productivity of any of the terrestrial biomes.

(ii) The high herbivore diversity and production is mirrored by the great variety of predators and scavengers.

(iii) Net primary productivity is low and extremely variable.

(iv) Characterized by large seasonal temperature variations, with hot summers and cold winters. Precipitation varies, with a strong summer peak.

  1. A - (i) B - (ii) C - (iii) D - (iv)
  2. A - (iii) B - (iv) C - (ii) D - (i)
  3. A - (ii) B - (i) C - (iv) D - (iii)
  4. A - (iv) B - (iii) C - (i) D - (ii)

Question 9. 

Which of the following is NOT a function of the ecosystem?
  1. Nutrient cycling.
  2. Primary production
  3. Niche overlap
  4. Resilience

Question 10. 

Hay is boiled in water and cooled. Some pond water, containing only heterotrophic protozoa, is added to it and kept in the dark for a long time.

Which of the following are TRUE?

I. Heterotrophic succession of protozoa will occur with an increase in total biomass.

II. The energy of the system is maximum at the beginning.

III. Succession will occur, eventually reaching a steady state in which energy flow is maintained.

IV. The ecosystem may undergo succession but ultimately all organisms will die or go to resting stages.

  1. I and III
  2. II and IV
  3. II and III
  4. I and IV
Answer key For Ecological Principle
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