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

Lichen and algae form

Climax community

Pioneers community

Initiator community

Seral community

2 / 20

Disease in living organisms caused by parasites is called

Parasitism

Infestation

Predation

Infection

3 / 20

Secondary succession starts from A.

A bar rock sand

Clear glacial pool

From remains of previous ecosystem

Fire

4 / 20

Which statement is true?

Producers are heterotrophic organisms

Consumers are autotrophic organisms

Fungi and bacteria are decomposers

Consumers release chemical elements as ions

5 / 20

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

Niche

Succession

Alterations

Neo-ecology

6 / 20

Plants growing in xeric conditions are called

Spherophytes

Mesophytes

Xerophytes

Teridophytes

7 / 20

The biosphere covers about

. 8-10 km

5-10 km

15-30 km

16-20 km

8 / 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

9 / 20

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

Species

Family

Community

Biomes

10 / 20

Mosses are

Dermatocarpon

Permellia

Tortula

Both b and c

11 / 20

Abiotic components include

Atmosphere

Hydrosphere

Lithosphere

All of these

12 / 20

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

Ecology

Synecology

Autecology

Niche

13 / 20

Legume plants are the hosts to

Rhizobium

Mycorrhiza

Lichen

Algae

14 / 20

The actual location or place where an organism lives is

Environment

Biosphere

Biomass

Habitat

15 / 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

16 / 20

Study of relationship of organisms to their environment is

Ecology

Palaentology

Geology

None of these

17 / 20

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

Mycorrhiza

Rhizobium

Lichen

Legume

18 / 20

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

Nichon

Niche

Autecology

Profession

19 / 20

Wood forests form the

Pioneers community

Climax community

Top community

Transient community

20 / 20

Major regional ecological community of plants and animals forms

Biosphere

Biomass

Biomes

Bioecosystem

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