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Question (1)

QN008699

Biodiversity refers to the

(A) Variety of rocks in an area
(B) Variety of living organisms and their interactions
(C) Number of rivers in a region
(D) Amount of rainfall received

Correct Answer: B

Explanation:

Biodiversity means the variety of living organisms and their ecological interactions.

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Question (2)

QN008700

Which of the following is a direct function of plants in maintaining biodiversity?

(A) Seed predation
(B) Nutrient recycling
(C) Food and oxygen production
(D) Soil erosion

Correct Answer: C

Explanation:

Plants produce food through photosynthesis and release oxygen.

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Question (3)

QN008701

Animals contribute to ecosystem stability mainly by

(A) Producing oxygen
(B) Pollinating flowers and dispersing seeds
(C) Fixing atmospheric nitrogen only
(D) Breaking rocks into soil

Correct Answer: B

Explanation:

Many animals help in pollination and seed dispersal.

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Question (4)

QN008702

Microorganisms help sustain biodiversity by

(A) Preventing rainfall
(B) Recycling nutrients
(C) Producing fossil fuels
(D) Consuming all organic matter

Correct Answer: B

Explanation:

Microorganisms decompose organic matter and recycle nutrients.

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Question (5)

QN008703

Which human activity is specifically mentioned as a threat to biodiversity?

(A) Afforestation
(B) Crop rotation
(C) Deforestation
(D) Seed dispersal

Correct Answer: C

Explanation:

Deforestation destroys habitats and reduces biodiversity.

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Question (6)

QN008704

Which combination represents major threats to biodiversity?

(A) Pollination, decomposition, dispersal
(B) Pollution, deforestation, overuse of resources, climate change
(C) Rainfall, rivers, mountains, oceans
(D) Photosynthesis, respiration, transpiration, excretion

Correct Answer: B

Explanation:

These are the major human-induced threats to biodiversity.

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Question (7)

QN008705

If a plant species that provides food to several animals becomes extinct, the most likely consequence is

(A) Increase in biodiversity
(B) Decline in dependent animal populations
(C) Immediate formation of new species
(D) Increased oxygen production

Correct Answer: B

Explanation:

Organisms dependent on that plant for food may decline.

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Question (8)

QN008706

A forest loses 20% of its pollinator species. Which ecological process is likely to be affected first?

(A) Seed germination
(B) Flower pollination
(C) Mineral weathering
(D) Rock formation

Correct Answer: B

Explanation:

Pollinators directly assist in pollination.

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Question (9)

QN008707

Biodiversity loss can trigger a chain reaction because

(A) Species exist independently
(B) Ecosystems have interconnected organisms
(C) Climate never changes
(D) All species perform identical roles

Correct Answer: B

Explanation:

Organisms are linked through food webs and ecological interactions.

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Question (10)

QN008708

Which statement best explains why the disappearance of one species may affect many others?

(A) Every species occupies the same niche
(B) Organisms are linked through ecological relationships
(C) Species do not compete for resources
(D) Biodiversity affects only plants

Correct Answer: B

Explanation:

Species depend on one another for survival.

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Question (1)

Biodiversity refers to the

Explanation:

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Question (2)

Which of the following is a direct function of plants in maintaining biodiversity?

Explanation:

Link:

Question (3)

Animals contribute to ecosystem stability mainly by

Explanation:

Link:

Question (4)

Microorganisms help sustain biodiversity by

Explanation:

Link:

Question (5)

Which human activity is specifically mentioned as a threat to biodiversity?

Explanation:

Link:

Question (6)

Which combination represents major threats to biodiversity?

Explanation:

Link:

Question (7)

If a plant species that provides food to several animals becomes extinct, the most likely consequence is

Explanation:

Link:

Question (8)

A forest loses 20% of its pollinator species. Which ecological process is likely to be affected first?

Explanation:

Link:

Question (9)

Biodiversity loss can trigger a chain reaction because

Explanation:

Link:

Question (10)

Which statement best explains why the disappearance of one species may affect many others?

Explanation:

Link:

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