Ecology MCQs

NEET Biology MCQs

 1. This factor contributes to the carbon cycle

(a) fossil fuel combustion

(b) respiration

(c) photosynthesis

(d) all of these

Answer: (d)

2. The source of carbon to plants in the carbon cycle is

(a) fossil fuels

(b) carbonate rocks

(c) atmospheric carbon dioxide

(d) all of the above

Answer: (c)

3. The role of bacteria in the carbon cycle is

(a) Breakdown of organic compounds

(b) Chemosynthesis

(c) Photosynthesis

(d) Assimilation of nitrogen compounds

Answer: (a)

4. In the carbon cycle, the human body returns carbon to the atmosphere through this way:

(a) formation of glucose

(b) waste products

(c) photosynthesis

(d) cellular respiration

Answer: (d)

5. Respiration and photosynthesis are central to this process

(a) nitrogen cycle

(b) phosphorous cycle

(c) carbon cycle

(d) sulphur cycle

6. The difference between the phosphorous cycle and carbon cycle lies in the fact that

(a) the phosphorous cycle does not include a gaseous phase but the carbon cycle does

(b) phosphorous does not enter living entities but carbon enters

(c) the phosphorous cycle includes a solid phase, the carbon cycle does not

(d) primary reservoir of the phosphorous cycle is the atmosphere, but rocks are the primary reservoirs for carbon cycle

Answer: (a)

7. Most of the global warming is due to the perturbation of which of these cycles?

(a) Global nitrogen cycle

(b) Global carbon cycle

(c) Global water cycle

(d) All of these cycles equally contribute

Answer: (b)

8. This carbon isotope is radioactive and very rare

(a) Carbon – 11

(b) Carbon – 12

(c) Carbon – 13

(d) Carbon – 14

Answer: (d

9. By this method, the majority of carbon moves from the lithosphere to the atmosphere

(a) erosion

(b) deposition

(c) weathering

(d) fossil fuel burning

Answer: (d)

10. These entities sequester most carbon from the atmosphere

(a) Plants

(b) Archaea

(c) Bacteria

(d) Insects

Answer: (a)

NEET Biology MCQs.  Ecology MCQs

Species Interraction

1. In this interaction, the interacting species stay close together

(a) Predation, Parasitism, Commensalism

(b) Competition and Mutualism

(c) Amensalism, Commensalism

(d) Amensalism, Predation and Parasitism

Answer: (a)

2. Predation can be considered as

(a) predator’s way of controlling prey’s energy level

(b) nature’s way of controlling predators food chain

(c) nature’s way of transferring energy to higher trophic levels

(d) prey’s way to control the population

Answer: (c)

3. This cannot be performed by predators

(a) allowing herbivores to be filled with energy fixed by autotrophs

(b) make the ecosystem stable

(c) controls the species of prey

(d) conduit for the transfer of energy

Answer: (a)

4. Prey is small, predator is massive, typically filter feeders – whales and zooplankton and lichen, graph is found to be linear

(a) Functional response

(b) Type 3 functional response

(c) Type 1 functional response

(d) Type 2 functional response

Answer: (c)

5. This can be a predator in a broad ecological context

(a) crow

(b) tiger

(c) lion

(d) seed eating sparrow

Answer: (d)

6. Predators which consume almost everything are

(a) generalist predators

(b) predation

(c) predators

(d) specialist predators

Answer: (a)

7. The reason why exotic species starts dispersing fast and turns invasive is

(a) because of successful establishment of the food web

(b) because of the lack of natural predator

(c) because of lack of competition from other exotic plants

(d) it gets better nutrition there

Answer: (b)

8. In an ecosystem, if you discard predators in a hypothetical scenario causing few species to become extinct, it indicates

(a) commensalism

(b) parasitism

(c) interspecific competition

(d) intraspecific competition

Answer: (c)

9. The starfish Pisaster amongst the rocky intertidal communities of the American Pacific coast is a significant

(a) Competitor

(b) Parasite

(c) Predator

(d) Prey

Answer: (c)

10. Predators suppression of prey declines with the increasing impact of prey on the next lower trophic level such as the impact of herbivores on plants – this is

(a) Predation cycles

(b) Parasitism

(c) Trophic cascades

(d) Top down

Answer: (c)