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Question (21)

QN0034282

In a community, producers number 90, herbivores 30, and carnivores 10. What is the simplified ratio?

(A) 9 : 3 : 1
(B) 3 : 2 : 1
(C) 9 : 1 : 3
(D) 1 : 3 : 9

Correct Answer: A

Explanation:

90 : 30 : 10 = 9 : 3 : 1.

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Question (22)

QN0034283

Why are decomposers called nature's recyclers?

(A) They produce oxygen.
(B) They return nutrients to the environment.
(C) They pollinate flowers.
(D) They control rainfall.

Correct Answer: B

Explanation:

Nutrients are recycled back into the ecosystem.

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Question (23)

QN0034284

Which of the following is a herbivore?

(A) Lion
(B) Deer
(C) Eagle
(D) Snake

Correct Answer: B

Explanation:

Deer feed on plants.

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Question (24)

QN0034285

In a food chain, if the frog population decreases sharply, the immediate effect is likely to be an increase in ________.

(A) snakes
(B) grass
(C) grasshoppers
(D) decomposers

Correct Answer: C

Explanation:

Frogs feed on grasshoppers.

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Question (25)

QN0034286

A grassland contains 75 grasses, 25 rabbits, and 5 foxes. What fraction of the total organisms counted are rabbits?

(A) 1/2
(B) 1/4
(C) 1/5
(D) 1/10

Correct Answer: B

Explanation:

Total = 105, Rabbits = 25, so 25/105 ≈ 1/4.

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Question (26)

QN0034287

Which of the following is an omnivore?

(A) Cow
(B) Tiger
(C) Human
(D) Deer

Correct Answer: C

Explanation:

Humans eat both plant and animal products.

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Question (27)

QN0034288

If decomposers are removed from an ecosystem, what is the most likely result?

(A) Dead matter accumulates.
(B) Producers increase rapidly.
(C) Food chains disappear immediately.
(D) Carnivores become producers.

Correct Answer: A

Explanation:

Dead organic matter will not be broken down.

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Question (28)

QN0034289

In a food chain, a mouse eats seeds and is eaten by an owl. The mouse is a ________.

(A) producer
(B) primary consumer
(C) secondary consumer
(D) decomposer

Correct Answer: B

Explanation:

Mouse feeds directly on producers.

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Question (29)

QN0034290

A community contains 45 plants, 15 herbivores, and 5 carnivores. What is the ratio of herbivores to carnivores?

(A) 1 : 3
(B) 2 : 1
(C) 3 : 1
(D) 9 : 1

Correct Answer: C

Explanation:

15 : 5 = 3 : 1.

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Question (30)

QN0034291

Which trophic level generally contains the greatest number of organisms?

(A) Producers
(B) Primary consumers
(C) Secondary consumers
(D) Tertiary consumers

Correct Answer: A

Explanation:

Producers form the base of the food chain.

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Question (21)

In a community, producers number 90, herbivores 30, and carnivores 10. What is the simplified ratio?

Explanation:

Link:

Question (22)

Why are decomposers called nature's recyclers?

Explanation:

Link:

Question (23)

Which of the following is a herbivore?

Explanation:

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Question (24)

In a food chain, if the frog population decreases sharply, the immediate effect is likely to be an increase in ________.

Explanation:

Link:

Question (25)

A grassland contains 75 grasses, 25 rabbits, and 5 foxes. What fraction of the total organisms counted are rabbits?

Explanation:

Link:

Question (26)

Which of the following is an omnivore?

Explanation:

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Question (27)

If decomposers are removed from an ecosystem, what is the most likely result?

Explanation:

Link:

Question (28)

In a food chain, a mouse eats seeds and is eaten by an owl. The mouse is a ________.

Explanation:

Link:

Question (29)

A community contains 45 plants, 15 herbivores, and 5 carnivores. What is the ratio of herbivores to carnivores?

Explanation:

Link:

Question (30)

Which trophic level generally contains the greatest number of organisms?

Explanation:

Link:

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