Prelims Revision Series | Science and Tech| Ecology (Part -2) | 35

June 1, 2023

Approximately how much of the solar energy that falls on the leaves of a plant is converted to chemical energy by photosynthesis?

(A) Less than 1%
(B) 2-10%
(C) 30%
(D) 50%

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Answer : B

During the process of ecological succession the changes that take place in communities are:

(A) Orderly and sequential
(B) Random
(C) Very quick
(D) Not influenced by the physical environment.

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Answer : A

The sequence of communities of primary succession in water is:

(A) Phytoplankton, sedges, free-floating hydrophytes, rooted hydrophytes, grasses and trees.
(B) Phytoplankton, free-floating hydrophytes, rooted hydrophytes, sedges, grasses and trees.
(C) Free-floating hydrophytes, sedges, phytoplankton, rooted hydrophytes, grasses and trees.
(D) Phytoplankton, rooted submerged hydrophytes, floating hydrophytes, reed swamp, sedges, meadow and trees.

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Answer 😀

If the carbon atoms fixed by producers already have passed through three species, the trophic level of the last species would be.

(A) Scavenger
(B) Tertiary producer
(C) Tertiary consumer
(D) Secondary consumer

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Answer : C

Which of the following is an ecosystem service provided by a natural ecosystem?

(A) Cycling of nutrients
(B) Prevention of soil erosion
(C) Pollutant absorption and reduction of the threat of global warming
(D) All of the above

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Answer : D

What parameters are used for tiger census in our country’s national parks and sanctuaries?

(A) Pug marks only
(B) Pug marks and faecal pellets
(C) Faecal pellets only
(D) Actual head counts

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Answer : B

An inverted pyramid of biomass can be found in which ecosystem?

(A) Forest
(B) Marine
(C) Grass land
(D) Tundra

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Answer : B

Where among the following will you find pitcher plant?

(A) Rain forest of North-East India
(B) Sunderbans
(C) Thar Desert
(D) Western Ghats

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Answer : A

Which one of the following is not a major characteristic feature of biodiversity hot spots?

(A) Large number of species
(B) Abundance of endemic species
(C) Mostly located in the tropics
(D) Mostly located in the polar regions

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Answer : D

Match the animals given in column I with their location in column II:
Column I Column II
A. Dodo i. Africa
B. Quagga ii. Russia
C. Thylacine iii. Mauritius
D. Stellar's sea cow iv. Australia
Choose the correct match from the following:

(A) A-i, B-iii, C-ii, D-iv
(B) A-iv, B-iii, C-i, D-ii
(C) A-iii, B-i, C-ii, D-iv
(D) A-iii, B-i, C-iv, D-ii

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Answer : d

The one-horned rhinoceros is specific to which of the following sanctuary

(A) Bhitar Kanika
(B) Bandipur
(C) Kaziranga
(D) Corbett park

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Answer : c

Amongst the animal groups given below, which one appears to be more vulnerable to extinction?

(A) Insects
(B) Mammals
(C) Amphibians
(D) Reptiles

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Answer: C

What is common to Lantana, Eichhornia and African catfish?

(A) All are endangered species of India.
(B) All are keystone species.
(C) All are mammals found in India.
(D) All the species are neither threatened nor indigenous species of India

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Answer :d

Among the ecosystem mentioned below, where can one find maximum biodiversity?

(A) Mangroves
(B) Desert
(C) Coral reefs
(D) Alpine meadows

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Answer : C

Which of the following forests is known as the ‘lungs of the planet Earth’?

(A) Taiga forest
(B) Tundra forest
(C) Amazon rain forest
(D) Rain forests of North East India

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Answer :C