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Question (21)

QN0034362

A pond ecosystem has 60 algae, 20 small fish, and 5 large fish. What is the ratio of algae : small fish : large fish?

(A) 12 : 4 : 1
(B) 6 : 2 : 1
(C) 3 : 2 : 1
(D) 4 : 2 : 1

Correct Answer: A

Explanation:

60 : 20 : 5 = 12 : 4 : 1.

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Question (22)

QN0034363

Which term is used for animals that eat only plants?

(A) Carnivores
(B) Omnivores
(C) Herbivores
(D) Parasites

Correct Answer: C

Explanation:

Herbivores feed on plants.

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Question (23)

QN0034364

If the number of grasshoppers in a food chain decreases sharply, which organism is likely to be affected first?

(A) Grass
(B) Frog
(C) Soil
(D) Water

Correct Answer: B

Explanation:

Frogs feed on grasshoppers.

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Question (24)

QN0034365

Which of the following food chains is correct?

(A) Tiger → Deer → Grass
(B) Grass → Deer → Tiger
(C) Deer → Grass → Tiger
(D) Grass → Tiger → Deer

Correct Answer: B

Explanation:

Food chains begin with producers.

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Question (25)

QN0034366

A food chain contains 4 trophic levels. Which trophic level contains herbivores?

(A) First
(B) Second
(C) Third
(D) Fourth

Correct Answer: B

Explanation:

Herbivores occupy the second trophic level.

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Question (26)

QN0034367

In a grassland, 64 rabbits are preyed upon by 16 foxes. What is the ratio of rabbits to foxes?

(A) 2 : 1
(B) 3 : 1
(C) 4 : 1
(D) 5 : 1

Correct Answer: C

Explanation:

64 : 16 = 4 : 1.

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Question (27)

QN0034368

Which organism receives energy directly from the producer?

(A) Primary consumer
(B) Secondary consumer
(C) Tertiary consumer
(D) Decomposer

Correct Answer: A

Explanation:

Primary consumers feed directly on producers.

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Question (28)

QN0034369

In a food chain, what happens to energy as it moves from one trophic level to the next?

(A) It increases continuously.
(B) It remains constant.
(C) It decreases.
(D) It becomes zero.

Correct Answer: C

Explanation:

Energy decreases at higher trophic levels.

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Question (29)

QN0034370

A food chain has Grass → Goat → Leopard. Which organism is the primary consumer?

(A) Grass
(B) Goat
(C) Leopard
(D) None

Correct Answer: B

Explanation:

Goat feeds directly on grass.

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Question (30)

QN0034371

There are 36 caterpillars feeding on 72 leaves. How many leaves are available per caterpillar on average?

(A) 1
(B) 2
(C) 3
(D) 4

Correct Answer: B

Explanation:

72 ÷ 36 = 2.

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Question (21)

A pond ecosystem has 60 algae, 20 small fish, and 5 large fish. What is the ratio of algae : small fish : large fish?

Explanation:

Link:

Question (22)

Which term is used for animals that eat only plants?

Explanation:

Link:

Question (23)

If the number of grasshoppers in a food chain decreases sharply, which organism is likely to be affected first?

Explanation:

Link:

Question (24)

Which of the following food chains is correct?

Explanation:

Link:

Question (25)

A food chain contains 4 trophic levels. Which trophic level contains herbivores?

Explanation:

Link:

Question (26)

In a grassland, 64 rabbits are preyed upon by 16 foxes. What is the ratio of rabbits to foxes?

Explanation:

Link:

Question (27)

Which organism receives energy directly from the producer?

Explanation:

Link:

Question (28)

In a food chain, what happens to energy as it moves from one trophic level to the next?

Explanation:

Link:

Question (29)

A food chain has Grass → Goat → Leopard. Which organism is the primary consumer?

Explanation:

Link:

Question (30)

There are 36 caterpillars feeding on 72 leaves. How many leaves are available per caterpillar on average?

Explanation:

Link:

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