Biology Ecosystems MCQs Chapter 11 Class 12

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Created on March 02, 2022 By Ali Durrani

Biology Ch 11 Class 12

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1 / 20

The biosphere covers about

. 8-10 km

5-10 km

15-30 km

16-20 km

2 / 20

Lichen and algae form

Climax community

Pioneers community

Initiator community

Seral community

3 / 20

Mosses are

Dermatocarpon

Permellia

Tortula

Both b and c

4 / 20

A dual organism composed of symbiotic association of an alga living within a fungus myceliium is

Mycorrhiza

Rhizobium

Lichen

Legume

5 / 20

Wood forests form the

Pioneers community

Climax community

Top community

Transient community

6 / 20

Study of a single population’s relationship to its environment is called

Ecology

Synecology

Autecology

Niche

7 / 20

The actual location or place where an organism lives is

Environment

Biosphere

Biomass

Habitat

8 / 20

Study of relationship of organisms to their environment is

Ecology

Palaentology

Geology

None of these

9 / 20

Secondary succession starts from A.

A bar rock sand

Clear glacial pool

From remains of previous ecosystem

Fire

10 / 20

Diverse and stable community at the end of succession is

Diverse Climax communityand stable community at the end of succession is A. Climax community B. Pioneers community C. Top community D. Stable community Answer & Explanation Answer: Option A

Pioneers community

Top community

Stable community A

11 / 20

Major regional ecological community of plants and animals forms

Biosphere

Biomass

Biomes

Bioecosystem

12 / 20

All populations within an ecosystem interconnected to one another are known as

Species

Family

Community

Biomes

13 / 20

Legume plants are the hosts to

Rhizobium

Mycorrhiza

Lichen

Algae

14 / 20

Which statement is true?

Producers are heterotrophic organisms

Consumers are autotrophic organisms

Fungi and bacteria are decomposers

Consumers release chemical elements as ions

15 / 20

Hydrosere is

Secondary succession starting in a pond

. Primary succession starting in a pond

Primary succession starting on a dry soil

All of these

16 / 20

Abiotic components include

Atmosphere

Hydrosphere

Lithosphere

All of these

17 / 20

Sequence of changes in community and its non-living environment over a period of time is

Niche

Succession

Alterations

Neo-ecology

18 / 20

The role a species plays in a community including behavior and influence is

Nichon

Niche

Autecology

Profession

19 / 20

Disease in living organisms caused by parasites is called

Parasitism

Infestation

Predation

Infection

20 / 20

Plants growing in xeric conditions are called

Spherophytes

Mesophytes

Xerophytes

Teridophytes

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