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Question (21)

QN0034202

A river flowing through a forest indicates that ________.

(A) ecosystems never interact
(B) aquatic and terrestrial ecosystems may overlap
(C) only aquatic organisms survive there
(D) forests are abiotic

Correct Answer: B

Explanation:

Aquatic and terrestrial ecosystems can overlap and interact.

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Question (22)

QN0034203

Plants are called producers because they ________.

(A) consume animals
(B) decompose waste
(C) make their own food
(D) depend on other organisms for food

Correct Answer: C

Explanation:

Plants prepare food through photosynthesis.

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Question (23)

QN0034204

The term autotroph literally means ________.

(A) other food
(B) self food
(C) dead food
(D) mixed food

Correct Answer: B

Explanation:

Auto = self, troph = food.

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Question (24)

QN0034205

Which organism is a consumer?

(A) Tree
(B) Grass
(C) Deer
(D) Algae

Correct Answer: C

Explanation:

Deer depends on plants for food.

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Question (25)

QN0034206

An organism that feeds on both plants and animals is called a(n) ________.

(A) herbivore
(B) carnivore
(C) autotroph
(D) omnivore

Correct Answer: D

Explanation:

Omnivores consume both plant and animal matter.

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Question (26)

QN0034207

If a mouse eats grains and insects, it is classified as a(n) ________.

(A) producer
(B) herbivore
(C) carnivore
(D) omnivore

Correct Answer: D

Explanation:

It consumes both plant and animal food.

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Question (27)

QN0034208

In the food chain Grass → Grasshopper → Frog → Snake → Eagle, the frog occupies the ________.

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

Correct Answer: C

Explanation:

Frog feeds on grasshopper, making it a third trophic level organism.

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Question (28)

QN0034209

In a crop field food chain Millet → Mouse → Eagle, which organism occupies the first trophic level?

(A) Eagle
(B) Mouse
(C) Millet
(D) Both mouse and eagle

Correct Answer: C

Explanation:

Producers always occupy the first trophic level.

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Question (29)

QN0034210

If the mouse population in a crop field suddenly decreases, the eagle population is most likely to ________.

(A) increase immediately
(B) remain unaffected
(C) decrease due to less food
(D) become producers

Correct Answer: C

Explanation:

Less prey leads to less food for eagles.

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Question (30)

QN0034211

Food chains in an ecosystem are interconnected to form a ________.

(A) habitat
(B) food web
(C) population
(D) niche

Correct Answer: B

Explanation:

Interconnected food chains form a food web.

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Question (21)

A river flowing through a forest indicates that ________.

Explanation:

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Question (22)

Plants are called producers because they ________.

Explanation:

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Question (23)

The term autotroph literally means ________.

Explanation:

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Question (24)

Which organism is a consumer?

Explanation:

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Question (25)

An organism that feeds on both plants and animals is called a(n) ________.

Explanation:

Link:

Question (26)

If a mouse eats grains and insects, it is classified as a(n) ________.

Explanation:

Link:

Question (27)

In the food chain Grass → Grasshopper → Frog → Snake → Eagle, the frog occupies the ________.

Explanation:

Link:

Question (28)

In a crop field food chain Millet → Mouse → Eagle, which organism occupies the first trophic level?

Explanation:

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Question (29)

If the mouse population in a crop field suddenly decreases, the eagle population is most likely to ________.

Explanation:

Link:

Question (30)

Food chains in an ecosystem are interconnected to form a ________.

Explanation:

Link:

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