Free Ecosystem (Monthly Quiz: 1) NEET Biology Questions & Answers with Detailed Explanation & Full Review

Question-1

The early settlers on a barren area (rock) are

(a) Lichens

(b) Mosses

(c) Ferns

(d) Diatoms

Question-2

In ecosystem, the nonliving components are

(a) Equally important as those of the living components.

(b) Less important than the living components.

(c) More important than living components.

(d) None of the above

Question-3

Select the correct match for the below given stages of succession.

(a) A: Marsh-meadow stage, B: Submerged free floating plant stage, C: Scrub stages, D: Phytoplankton, E: Submerged plant, F: Reed swamp stage

(b) A: Phytoplankton, B: Submerged plant, C: Submerged free floating plant stage, D: Reed swamp stage, E: Marsh-meadow stage, F: Scrub stages

(c) A: Scrub stages, B: Marsh-meadow stage, C: Phytoplankton, D: Reed swamp stage, E: Submerged plant, F: Submerged free floating plant stage

(d) A: Scrub stages, B: Phytoplankton, C: Reed swamp stage, D: Marsh-meadow stage, E: Submersed free floating pant stage, F: Submerged plant

Question-4

Energy for the detritus food chain comes from

(a) air

(b) organic remain

(c) radiation

(d) water

Question-5

Primary succession occurs on/in

(a) Newly cooled lava

(b) Bare rocks

(c) Newly created pond

(d) All of these

Question-6

The mass of living material at a trophic level at a particular time is called

(a) standing state

(b) gross primary productivity

(c) net primary productivity

(d) standing crop

Question-7

Decomposition is favoured by

(a) Rich amount of nitrogen and water soluble substance like sugar in detritus.

(b) Warm and moist environment.

(c) Aerobic environment

(d) All the above

Question-8

PAR stands for

(a) Photosynthesis Absorb Radiation

(b) Photosynthesis Active Reaction

(c) Photosynthetically Active Radiation

(d) Photosynthetically Active Reaction

Question-9

The transfer of energy from one trophic level to another is governed by the 2nd law of thermodynamics. The average efficiency of energy transfer from herbivores to carnivores is

(a) 10%

(b) 5%

(c) 25%

(d) 50%

Question-10

Assertion:
Vertical distribution of different species occupying different levels is called stratification.
Reason:
Tree occupy top vertical strata of forest.

(a) If both the assertion and reason are true but the reason is not a correct explanation of the assertion.

(b) If both the assertion and the reason are true and the reason is a correct explanation of the assertion.

(c) If the assertion is true but the reason is false.

(d) If both the assertion and reason are false.

Question-11

Which one of the following is a characteristic feature of cropland ecosystem?

(a) Absence of soil organisms

(b) Ecological succession

(c) Absence of weeds

(d) Least genetic diversity

Question-12

In a terrestrial ecosystem such as forest, maximum energy is in which trophic level?

(a) $T_4$

(b) $T_3$

(c) $T_1$

(d) $T_2$

Question-13

Reason of fast speciation in present day crop plants is

(a) isolation

(b) mutation

(c) polyploidy

(d) sexual reproduction

Question-14

Given below is the diagram of the ecological pyramids. This type represents

(a) pyramid of biomass in a lake

(b) pyramid of number in a grassland

(c) pyramid of biomass in a land

(d) pyramid of energy

Question-15

Which one of the following is not a functional unit of an ecosystem?

(a) Decomposition

(b) Energy flow

(c) Productivity

(d) Stratification

Question-16

Litter is decomposed by how many organisms among the following?
Earthworm, Bacteria, Fungi, Mites

(a) 2

(b) 1

(c) 3

(d) 4

Question-17

A community which starts succession in a habitat is

(a) Biotic community

(b) Seral community

(c) Pioneer community

(d) Ecosere

Question-18

What human activities are responsible to increase the amount of $CO_2$ in the atmosphere?

(a) Massive burning of fossil fuels

(b) Deforestation

(c) Vehicle used for transport

(d) All of the above

Question-19

Which one of the following is not used for construction of ecological pyramids?

(a) Dry weight

(b) Fresh weight

(c) Number of individuals

(d) Rate of energy flow

Question-20

During ecological succession

(a) the changes lead to a community that is in near equilibrium with the environment and is called pioneer community

(b) the numbers and types of animals remain constant

(c) the gradual and predictable change in species composition occurs in a given area

(d) the establishment of a new biotic community is very fast in its primary phase.