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Question (31)

QN0034292

If the population of rabbits falls from 40 to 24, by how many individuals has it decreased?

(A) 12
(B) 14
(C) 16
(D) 18

Correct Answer: C

Explanation:

40 − 24 = 16.

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Question (32)

QN0034293

In a forest, mushrooms are important because they ________.

(A) hunt herbivores
(B) perform pollination
(C) decompose dead matter
(D) produce seeds

Correct Answer: C

Explanation:

Mushrooms act as decomposers.

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Question (33)

QN0034294

Which statement best describes a food chain?

(A) It shows climatic conditions.
(B) It shows transfer of energy through feeding relationships.
(C) It shows only plant populations.
(D) It shows abiotic factors only.

Correct Answer: B

Explanation:

Food chains represent feeding relationships and energy flow.

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Question (34)

QN0034295

A food chain contains Grass → Grasshopper → Frog → Snake → Eagle. Which organism occupies the fifth trophic level?

(A) Frog
(B) Snake
(C) Eagle
(D) Grasshopper

Correct Answer: C

Explanation:

Eagle occupies the fifth trophic level.

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Question (35)

QN0034296

If there are 80 plants, 20 rabbits, and 4 foxes, what is the ratio of rabbits to total animals?

(A) 1 : 5
(B) 5 : 6
(C) 1 : 4
(D) 4 : 5

Correct Answer: B

Explanation:

Total animals = 20 + 4 = 24, ratio = 20 : 24 = 5 : 6.

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Question (36)

QN0034297

Which group depends directly on producers for food?

(A) Secondary consumers
(B) Tertiary consumers
(C) Primary consumers
(D) Decomposers only

Correct Answer: C

Explanation:

Primary consumers eat producers directly.

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Question (37)

QN0034298

In a pond, algae population increases greatly. Which organism is likely to benefit first if it feeds on algae?

(A) Primary consumers
(B) Top carnivores
(C) Decomposers only
(D) Parasites

Correct Answer: A

Explanation:

Organisms feeding directly on algae benefit first.

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Question (38)

QN0034299

A food chain cannot function without producers because producers ________.

(A) recycle nutrients
(B) provide the initial source of food and energy
(C) decompose waste
(D) prey on herbivores

Correct Answer: B

Explanation:

Producers introduce energy into the ecosystem.

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Question (39)

QN0034300

If 72 leaves are eaten by 18 caterpillars, how many leaves are available per caterpillar on average?

(A) 2
(B) 3
(C) 4
(D) 5

Correct Answer: C

Explanation:

72 ÷ 18 = 4.

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Question (40)

QN0034301

Which statement best supports the idea that every organism in a community matters?

(A) Only producers are important.
(B) Only carnivores maintain balance.
(C) Different organisms perform different roles that keep the community functioning.
(D) Decomposers are less important than consumers.

Correct Answer: C

Explanation:

Every organism contributes to ecosystem balance through its role.

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Question (31)

If the population of rabbits falls from 40 to 24, by how many individuals has it decreased?

Explanation:

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Question (32)

In a forest, mushrooms are important because they ________.

Explanation:

Link:

Question (33)

Which statement best describes a food chain?

Explanation:

Link:

Question (34)

A food chain contains Grass → Grasshopper → Frog → Snake → Eagle. Which organism occupies the fifth trophic level?

Explanation:

Link:

Question (35)

If there are 80 plants, 20 rabbits, and 4 foxes, what is the ratio of rabbits to total animals?

Explanation:

Link:

Question (36)

Which group depends directly on producers for food?

Explanation:

Link:

Question (37)

In a pond, algae population increases greatly. Which organism is likely to benefit first if it feeds on algae?

Explanation:

Link:

Question (38)

A food chain cannot function without producers because producers ________.

Explanation:

Link:

Question (39)

If 72 leaves are eaten by 18 caterpillars, how many leaves are available per caterpillar on average?

Explanation:

Link:

Question (40)

Which statement best supports the idea that every organism in a community matters?

Explanation:

Link:

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