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Question (31)

QN0034212

A food web is generally more stable than a single food chain because organisms ________.

(A) have only one food source
(B) do not interact
(C) may be connected through multiple feeding relationships
(D) stop competing

Correct Answer: C

Explanation:

Multiple feeding links provide alternative food sources.

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Question (32)

QN0034213

Mushrooms growing on dead tree trunks are examples of ________.

(A) producers
(B) consumers
(C) decomposers
(D) pollinators

Correct Answer: C

Explanation:

Mushrooms are fungi that decompose dead matter.

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Question (33)

QN0034214

The process by which fungi and bacteria break down dead matter is called ________.

(A) pollination
(B) decomposition
(C) predation
(D) germination

Correct Answer: B

Explanation:

Decomposition recycles nutrients back into the environment.

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Question (34)

QN0034215

If decomposers suddenly disappeared from a forest, what would happen first?

(A) Dead matter would accumulate.
(B) More nutrients would enter the soil.
(C) Photosynthesis would increase.
(D) Food webs would become stronger.

Correct Answer: A

Explanation:

Dead plants and animals would not be broken down.

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Question (35)

QN0034216

A pond becomes polluted and many aquatic plants die. Which change is expected next?

(A) Increase in dissolved oxygen
(B) Decrease in fish population
(C) Increase in plant population
(D) Increase in pollination

Correct Answer: B

Explanation:

Fewer plants produce less oxygen, affecting fish survival.

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Question (36)

QN0034217

A decline in frog population due to excessive harvesting would most likely cause ________.

(A) fewer insect pests
(B) more insect pests
(C) more pollinators only
(D) higher frog reproduction

Correct Answer: B

Explanation:

Frogs control insect populations by feeding on them.

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Question (37)

QN0034218

Competition among organisms helps ecosystems by ________.

(A) eliminating all species
(B) increasing pollution
(C) controlling population sizes
(D) stopping reproduction

Correct Answer: C

Explanation:

Competition prevents excessive population growth.

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Question (38)

QN0034219

In the relationship between honeybees and flowers, both organisms benefit. This is called ________.

(A) parasitism
(B) commensalism
(C) mutualism
(D) decomposition

Correct Answer: C

Explanation:

Both honeybee and flower gain benefits.

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Question (39)

QN0034220

Orchids growing on tree branches without harming the tree illustrate ________.

(A) mutualism
(B) commensalism
(C) parasitism
(D) competition

Correct Answer: B

Explanation:

Orchid benefits while the tree remains unaffected.

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Question (40)

QN0034221

Ticks feeding on a dog's blood represent ________.

(A) mutualism
(B) commensalism
(C) parasitism
(D) pollination

Correct Answer: C

Explanation:

The tick benefits while the dog is harmed.

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Question (31)

A food web is generally more stable than a single food chain because organisms ________.

Explanation:

Link:

Question (32)

Mushrooms growing on dead tree trunks are examples of ________.

Explanation:

Link:

Question (33)

The process by which fungi and bacteria break down dead matter is called ________.

Explanation:

Link:

Question (34)

If decomposers suddenly disappeared from a forest, what would happen first?

Explanation:

Link:

Question (35)

A pond becomes polluted and many aquatic plants die. Which change is expected next?

Explanation:

Link:

Question (36)

A decline in frog population due to excessive harvesting would most likely cause ________.

Explanation:

Link:

Question (37)

Competition among organisms helps ecosystems by ________.

Explanation:

Link:

Question (38)

In the relationship between honeybees and flowers, both organisms benefit. This is called ________.

Explanation:

Link:

Question (39)

Orchids growing on tree branches without harming the tree illustrate ________.

Explanation:

Link:

Question (40)

Ticks feeding on a dog's blood represent ________.

Explanation:

Link:

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