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Question (31)

QN008729

If a conservation programme increases an endangered population from 120 to 180 individuals, the increase is

(A) 40
(B) 50
(C) 60
(D) 80

Correct Answer: C

Explanation:

Increase = 180 − 120 = 60 individuals.

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Question (32)

QN008730

A biodiversity survey records 300 species in Year 1 and 270 species in Year 5. What is the percentage decline?

(A) 5%
(B) 10%
(C) 15%
(D) 20%

Correct Answer: B

Explanation:

Decline = 30 species; (30 ÷ 300) × 100 = 10%.

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Question (33)

QN008731

Which statement best defines biodiversity conservation?

(A) Elimination of all predators
(B) Protection and sustainable management of living diversity
(C) Conversion of forests into cities
(D) Exclusive focus on one species

Correct Answer: B

Explanation:

Biodiversity conservation involves protecting and sustainably managing biological diversity.

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Question (34)

QN008732

A researcher finds that loss of one insect species reduces pollination in five plant species. This observation best illustrates

(A) Ecological interdependence
(B) Geological succession
(C) Artificial selection
(D) Mineral cycling only

Correct Answer: A

Explanation:

Species depend on one another within ecosystems.

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Question (35)

QN008733

Which statement most strongly supports the need for biodiversity conservation?

(A) Every species performs a role that contributes to ecosystem functioning
(B) All species are equally abundant everywhere
(C) Ecosystems function better with fewer species
(D) Biodiversity affects only wildlife reserves

Correct Answer: A

Explanation:

Each species contributes to maintaining ecosystem balance and functioning.

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