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Question (11)

QN0036232

11 Decomposers convert complex organic substances into

(A) complex proteins only
(B) simple inorganic substances
(C) sunlight
(D) oxygen only

Correct Answer: B

Explanation:

Decomposers break down complex organic matter into simple inorganic substances.

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Question (12)

QN0036233

12 What would happen if decomposers were absent from an ecosystem?

(A) Dead matter would accumulate
(B) Plants would immediately disappear
(C) Sunlight would stop reaching Earth
(D) Rainfall would stop

Correct Answer: A

Explanation:

Without decomposers, dead organisms and wastes would accumulate.

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Question (13)

QN0036234

13 A series of organisms feeding on one another is called a

(A) food web
(B) food chain
(C) trophic pyramid
(D) decomposer cycle

Correct Answer: B

Explanation:

A food chain shows a series of organisms through which feeding occurs.

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Question (14)

QN0036235

14 Each step or level in a food chain is called a

(A) food web
(B) trophic level
(C) producer level
(D) decomposition level

Correct Answer: B

Explanation:

Each feeding position in a food chain is known as a trophic level.

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Question (15)

QN0036236

15 Producers occupy which trophic level?

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

Correct Answer: A

Explanation:

Producers or autotrophs form the first trophic level.

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Question (16)

QN0036237

16 Herbivores generally occupy the

(A) first trophic level
(B) second trophic level
(C) third trophic level
(D) fourth trophic level

Correct Answer: B

Explanation:

Herbivores are primary consumers and occupy the second trophic level.

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Question (17)

QN0036238

17 Small carnivores generally occupy the

(A) first trophic level
(B) second trophic level
(C) third trophic level
(D) fifth trophic level

Correct Answer: C

Explanation:

Small carnivores are secondary consumers and form the third trophic level.

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Question (18)

QN0036239

18 Larger carnivores generally form the

(A) first trophic level
(B) second trophic level
(C) third trophic level
(D) fourth trophic level

Correct Answer: D

Explanation:

Larger carnivores are tertiary consumers and occupy the fourth trophic level.

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Question (19)

QN0036240

19 In a food chain, energy initially comes from

(A) soil
(B) sunlight
(C) decomposers
(D) consumers

Correct Answer: B

Explanation:

Producers capture energy from sunlight and convert it into chemical energy.

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Question (20)

QN0036241

20 What do autotrophs do with solar energy?

(A) Destroy it
(B) Convert it into chemical energy
(C) Convert it into soil
(D) Store it as minerals

Correct Answer: B

Explanation:

Autotrophs capture sunlight and convert it into chemical energy through photosynthesis.

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Question (11)

11 Decomposers convert complex organic substances into

Explanation:

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Question (12)

12 What would happen if decomposers were absent from an ecosystem?

Explanation:

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Question (13)

13 A series of organisms feeding on one another is called a

Explanation:

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Question (14)

14 Each step or level in a food chain is called a

Explanation:

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Question (15)

15 Producers occupy which trophic level?

Explanation:

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Question (16)

16 Herbivores generally occupy the

Explanation:

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Question (17)

17 Small carnivores generally occupy the

Explanation:

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Question (18)

18 Larger carnivores generally form the

Explanation:

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Question (19)

19 In a food chain, energy initially comes from

Explanation:

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Question (20)

20 What do autotrophs do with solar energy?

Explanation:

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