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Question (31)

QN008379

Which feature allowed animals to develop coordinated behaviour?

(A) Presence of nervous control systems
(B) Absence of movement
(C) Lack of response to stimuli
(D) Dependence on water currents only

Correct Answer: A

Explanation:

Nervous systems help coordination and response.

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Question (32)

QN008380

Which evolutionary change is associated with echinoderms?

(A) Loss of internal support
(B) Development of internal skeleton
(C) Absence of movement
(D) Presence of feathers

Correct Answer: B

Explanation:

Echinoderms possess internal skeletal support.

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Question (33)

QN008381

Which characteristic separates vertebrates from invertebrates most directly?

(A) Presence of chlorophyll
(B) Presence of backbone
(C) Presence of pores
(D) Presence of spores

Correct Answer: B

Explanation:

Vertebrates possess a vertebral column.

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Question (34)

QN008382

A plant species produces seeds enclosed within fruits and depends on pollinators. It belongs to

(A) Bryophyta
(B) Gymnosperms
(C) Pteridophytes
(D) Angiosperms

Correct Answer: D

Explanation:

Angiosperms produce flowers and fruits.

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Question (35)

QN008383

Why are fossils considered evidence for evolution of biodiversity?

(A) They show only present organisms
(B) They record changes in life forms over time
(C) They eliminate classification
(D) They prevent extinction

Correct Answer: B

Explanation:

Fossils preserve evidence of past life forms.

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Question (36)

QN008384

Which scientist’s work connected present-day plants with their fossil ancestors?

(A) Carl Woese
(B) Aristotle
(C) Birbal Sahni
(D) Linnaeus

Correct Answer: C

Explanation:

Birbal Sahni studied fossil plants and plant evolution.

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Question (37)

QN008385

Older fossil layers generally contain

(A) More complex organisms only
(B) Simpler organisms
(C) Only flowering plants
(D) Only vertebrates

Correct Answer: B

Explanation:

Simpler organisms appeared earlier in Earth’s history.

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Question (38)

QN008386

Which statement correctly explains why classification systems evolve?

(A) Science never changes
(B) New discoveries provide better understanding
(C) Organisms disappear permanently
(D) Classification depends only on language

Correct Answer: B

Explanation:

Scientific knowledge improves with new evidence.

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Question (39)

QN008387

Which development in science helped compare organisms at the DNA level?

(A) Discovery of fire
(B) Genetic studies and advanced microscopes
(C) Development of farming
(D) Observation of fossils only

Correct Answer: B

Explanation:

Genetic studies revealed relationships among organisms.

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Question (40)

QN008388

Carl Woese proposed the three-domain system based mainly on

(A) Habitat differences
(B) Genetic evidence
(C) Body colour
(D) Food habits only

Correct Answer: B

Explanation:

DNA studies led to the three-domain classification.

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Question (31)

Which feature allowed animals to develop coordinated behaviour?

Explanation:

Link:

Question (32)

Which evolutionary change is associated with echinoderms?

Explanation:

Link:

Question (33)

Which characteristic separates vertebrates from invertebrates most directly?

Explanation:

Link:

Question (34)

A plant species produces seeds enclosed within fruits and depends on pollinators. It belongs to

Explanation:

Link:

Question (35)

Why are fossils considered evidence for evolution of biodiversity?

Explanation:

Link:

Question (36)

Which scientist’s work connected present-day plants with their fossil ancestors?

Explanation:

Link:

Question (37)

Older fossil layers generally contain

Explanation:

Link:

Question (38)

Which statement correctly explains why classification systems evolve?

Explanation:

Link:

Question (39)

Which development in science helped compare organisms at the DNA level?

Explanation:

Link:

Question (40)

Carl Woese proposed the three-domain system based mainly on

Explanation:

Link:

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