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Question (21)

QN008369

Vertebrates show advanced movement mainly because of

(A) Lack of skeletal support
(B) Presence of vertebral column and endoskeleton
(C) Dependence only on diffusion
(D) Presence of pores

Correct Answer: B

Explanation:

Endoskeleton supports body and movement.

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Question (22)

QN008370

Which adaptation makes flight possible in birds?

(A) Thick fur and claws
(B) Hollow bones and feathers
(C) Moist skin
(D) Segmented body

Correct Answer: B

Explanation:

Hollow bones reduce weight and feathers help flight.

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Question (23)

QN008371

A camel survives desert conditions mainly because of

(A) Gills
(B) Fat storage adaptations
(C) Moist skin
(D) Tentacles

Correct Answer: B

Explanation:

Fat storage helps camels survive long periods without food and water.

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Question (24)

QN008372

Which statement best explains evolution of biodiversity?

(A) Organisms remained unchanged over time
(B) Structural changes over long periods produced diversity
(C) All organisms evolved simultaneously
(D) Biodiversity developed instantly

Correct Answer: B

Explanation:

Biodiversity evolved gradually through structural adaptations.

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Question (25)

QN008373

Which feature helped gymnosperms reproduce without water?

(A) Seeds and pollen transfer
(B) Rhizoids
(C) Spore dependence
(D) Thallus body

Correct Answer: A

Explanation:

Pollen transfer enabled reproduction independent of water.

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Question (26)

QN008374

Which plant group still depends on water for reproduction despite having vascular tissues?

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

Correct Answer: C

Explanation:

Pteridophytes require water for fertilisation.

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Question (27)

QN008375

A newly discovered organism has pores all over the body and lacks tissues. It most likely belongs to

(A) Arthropoda
(B) Porifera
(C) Annelida
(D) Mollusca

Correct Answer: B

Explanation:

Poriferans possess pores and lack true tissues.

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Question (28)

QN008376

Which evolutionary advantage is associated with development of flowers?

(A) Reduced pollination
(B) Efficient reproduction
(C) Elimination of seeds
(D) Dependence only on water

Correct Answer: B

Explanation:

Flowers attract pollinators and improve reproduction.

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Question (29)

QN008377

Which characteristic most strongly indicates advancement from bryophytes to pteridophytes?

(A) Presence of chlorophyll
(B) Presence of vascular tissues
(C) Dependence on moisture
(D) Spore formation

Correct Answer: B

Explanation:

Vascular tissues increased transport efficiency in plants.

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Question (30)

QN008378

Why can arthropods occupy diverse habitats successfully?

(A) They lack muscles
(B) Their exoskeleton provides protection and support
(C) They possess only tissue-level organisation
(D) They reproduce only in water

Correct Answer: B

Explanation:

Exoskeleton supports movement and prevents water loss.

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Question (21)

Vertebrates show advanced movement mainly because of

Explanation:

Link:

Question (22)

Which adaptation makes flight possible in birds?

Explanation:

Link:

Question (23)

A camel survives desert conditions mainly because of

Explanation:

Link:

Question (24)

Which statement best explains evolution of biodiversity?

Explanation:

Link:

Question (25)

Which feature helped gymnosperms reproduce without water?

Explanation:

Link:

Question (26)

Which plant group still depends on water for reproduction despite having vascular tissues?

Explanation:

Link:

Question (27)

A newly discovered organism has pores all over the body and lacks tissues. It most likely belongs to

Explanation:

Link:

Question (28)

Which evolutionary advantage is associated with development of flowers?

Explanation:

Link:

Question (29)

Which characteristic most strongly indicates advancement from bryophytes to pteridophytes?

Explanation:

Link:

Question (30)

Why can arthropods occupy diverse habitats successfully?

Explanation:

Link:

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