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Question (21)

QN008219

Which reproductive strategy gives maximum protection to developing young ones?

(A) External fertilisation
(B) Internal fertilisation
(C) Spore formation
(D) Binary fission

Correct Answer: B

Explanation:

Internal fertilisation protects developing young ones better.

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Question (22)

QN008220

If human pregnancy lasts about 9 months, approximately how many weeks does it last?

(A) 18 weeks
(B) 24 weeks
(C) 36 weeks
(D) 40 weeks

Correct Answer: D

Explanation:

Human pregnancy lasts approximately 40 weeks.

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Question (23)

QN008221

Which feature increases survival rate in mammals?

(A) No parental care
(B) Development inside mother’s body
(C) External fertilisation only
(D) Absence of nourishment

Correct Answer: B

Explanation:

Development inside the mother’s body increases survival rate.

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Question (24)

QN008222

Which animal is most likely to produce the highest number of eggs?

(A) Cow
(B) Dog
(C) Frog
(D) Human

Correct Answer: C

Explanation:

Frogs produce a very large number of eggs.

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Question (25)

QN008223

If a frog releases 12,000 eggs and 0.5% survive, how many survive?

(A) 6
(B) 60
(C) 120
(D) 600

Correct Answer: B

Explanation:

0.5% of 12,000 = 60 surviving frogs.

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Question (26)

QN008224

Which feature best explains variation among siblings?

(A) Identical chromosome combination
(B) Gene recombination during sexual reproduction
(C) Budding process
(D) Binary fission

Correct Answer: B

Explanation:

Gene recombination creates variation among siblings.

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Question (27)

QN008225

Which statement correctly compares asexual and sexual reproduction?

(A) Sexual reproduction produces identical offspring
(B) Asexual reproduction produces greater variation
(C) Sexual reproduction involves two parents generally
(D) Asexual reproduction always requires gametes

Correct Answer: C

Explanation:

Sexual reproduction generally involves two parents.

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Question (28)

QN008226

Which reproductive variation is observed in birds?

(A) External fertilisation with no eggs
(B) Internal fertilisation and egg laying
(C) Binary fission
(D) Budding reproduction

Correct Answer: B

Explanation:

Birds show internal fertilisation and lay eggs.

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Question (29)

QN008227

Animals producing young ones directly are called

(A) oviparous
(B) viviparous
(C) bisexual
(D) asexual

Correct Answer: B

Explanation:

Viviparous animals give birth to young ones.

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Question (30)

QN008228

Animals laying eggs are called

(A) viviparous
(B) bisexual
(C) oviparous
(D) unicellular

Correct Answer: C

Explanation:

Oviparous animals lay eggs.

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Question (21)

Which reproductive strategy gives maximum protection to developing young ones?

Explanation:

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Question (22)

If human pregnancy lasts about 9 months, approximately how many weeks does it last?

Explanation:

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Question (23)

Which feature increases survival rate in mammals?

Explanation:

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Question (24)

Which animal is most likely to produce the highest number of eggs?

Explanation:

Link:

Question (25)

If a frog releases 12,000 eggs and 0.5% survive, how many survive?

Explanation:

Link:

Question (26)

Which feature best explains variation among siblings?

Explanation:

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Question (27)

Which statement correctly compares asexual and sexual reproduction?

Explanation:

Link:

Question (28)

Which reproductive variation is observed in birds?

Explanation:

Link:

Question (29)

Animals producing young ones directly are called

Explanation:

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Question (30)

Animals laying eggs are called

Explanation:

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