Fundamentals Ecology Objective Questions IASPrelims

Fundamentals Ecology Objective Questions IASPrelims

Question No:1

Consider the following statements and select the correct answer using the code given below:
1. Ecosystem is a group of organisms and the environment with which the organisms interact.
2. Geo-climatic conditions determine the main characteristics of ecosystems.

(A) Only 1 is correct
(B) Only 2 is correct
(C) Both 1 and 2 are correct
(D) Neither 1 nor 2 is correct

Question No:2

The term ‘Ecotone’ stands for:

(A) A transitional boundary between two floral communities.
(B) A transitional boundary between two wetlands.
(C) A transitional boundary between two ecosystems.
(D) A transitional boundary between two biosphere reserves.

Question No:3

Consider the following statements and select the correct answer using the code given below:
1. Ecology is the science of interaction between life forms and their environment.
2. Ecology is the science of ecosystems.
3. Ecotone is a boundary transition zone between adjoining ecosystems.
Code:

(A) 1 and 2 are correct
(B) 1 and 3 are correct
(C) 2 and 3 are correct
(D) 1,2 and 3 are correct

Question No:4

The greatest pool of carbon is in the:

(A) Atmosphere
(B) Coal deposits
(C) Oceans
(D) Dead organic matter

Question No:5

Which one of the following statements is correct about saprophytes?

(A) Saprophyte is a herbivore.
(B) Saprophyte is dependent on other organic matter,
(C) Saprophyte is an organism that obtains its food from the atmosphere,
(D) Saprophyte is a micro-organism that lives on decaying matter.

Question No:6

Which one of the biomes has the richest fauna?

(A) Taiga Biome
(B) Savanna Biome
(C) Mediterranean Biome
(D) Equatorial Biome

Question No:7

Which one of the following is the best description of the term ‘ecosystem’?

(A) A community of organisms interacting with one another,
(B) That part of the earth which is inhabited by living organisms,
(C) A community of organisms together with the environment in which they live.
(D) The flora and fauna of a geographical area.

Question No:8

8. The term ‘Goldilocks Zone’ is often seen in the news in the context of:

(A) The limits of habitable zone above the surface of the earth
(B) Regions inside the earth where shale gas is available
(C) Search for the earth-like planets in outer space
(D) Search for meteorites containing precious metals

Question No:9

Consider the following statements and select the correct answer using the code given below:
1. The biosphere is exclusively dependent on photosynthesis.
2. The term photosynthesis describes the reaction of materials within plant leaves.
Code:

(A) Only 1 is correct
(B) Only 2 is correct
(C) Both 1 and 2 are correct
(D) Neither 1 nor 2 is correct

Question No:10

Which one of the following statements is not correct?
a. Competition for light is the dominant factor in the formation of plant communities,
b. This competition is expressed in their height, orientation and structure.
c. Photosynthesis unites carbon dioxide and oxygen, both derived from water in the plant.
Code:

(A) 1 and 2 are correct
(B) 1 and 3 are correct
(C) 2 and 3 are correct
(D) 1,2 and 3 are correct

Question No:11

Consider the following statements and select the correct answer using the code given below:
1. Sun is the ultimate source of energy to the biosphere.
2. A tiny portion of light strikes the earth.
3. Light energy from the Sun is trapped by chlorophyll.
Code:

(A) 1 and 2 are correct
(B) 1 and 3 are correct
(C) 1,2 and 3 are correct
(D) 2 and 3 are correct

Question No:12

Consider the following statements:
1. The synthesis of organic compounds from inorganic compounds using energy stored in inorganic substances (sulphur, ammonia and hydrogen) is known as chemosynthesis.
2. The organisms at the bottom of oceans and dark caves develop through the process of chemosynthesis.

(A) Both 1 and 2 are correct
(B) Only 1 is correct
(C) Only 2 is correct
(D) Neither 1 nor 2 is correct

Question No:13

Which one of the following statements is not correct?

(A) An ecosystem consists of biotic and a biotic substances.
(B) The biotic components of an ecosystem include plants, animals and micro-organisms,
(C) Producers include only plants,
(D) Animals may be primary, secondary or tertiary consumers.

Question No:14

The concept of ‘altitudinal life zones’ of vegetation was given by:

(A) Alexander D.E.
(B) Alexander, J.W.
(C) Alexander von Humboldt
(D) Carl Hitter

Question No:15

Consider the following statements and select the correct answer using the code given below:
1. The altitudinal zones of plants and animals are analogous to life zones from equator to poles.
2. The Himalayas contain all type of fauna and flora found between the equator to the poles.

(A) Only 1 is correct
(B) Only 2 is correct
(C) Both 1 and 2 are correct
(D) Neither 1 nor 2 is correct