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Question (31)

QN008229

Which animal is viviparous?

(A) Frog
(B) Hen
(C) Fish
(D) Cow

Correct Answer: D

Explanation:

Cow is a viviparous animal because it gives birth to young ones.

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Question (32)

QN008230

Which animal is oviparous?

(A) Whale
(B) Dog
(C) Hen
(D) Human

Correct Answer: C

Explanation:

Hen is oviparous because it lays eggs.

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Question (33)

QN008231

A hen lays 20 eggs and 75% hatch successfully. How many chicks hatch?

(A) 5
(B) 10
(C) 15
(D) 18

Correct Answer: C

Explanation:

75% of 20 = 15 chicks hatch successfully.

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Question (34)

QN008232

Which reproductive method provides more variation among offspring?

(A) Fragmentation
(B) Budding
(C) Sexual reproduction
(D) Regeneration

Correct Answer: C

Explanation:

Sexual reproduction produces greater variation among offspring.

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Question (35)

QN008233

In external fertilisation, chances of fertilisation are increased by

(A) producing very few gametes
(B) producing large numbers of gametes
(C) avoiding water completely
(D) reducing egg number greatly

Correct Answer: B

Explanation:

Large numbers of gametes increase chances of fertilisation.

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Question (36)

QN008234

Which statement best explains why variation is useful?

(A) It decreases survival
(B) It prevents adaptation
(C) It increases chances of survival during environmental changes
(D) It stops reproduction

Correct Answer: C

Explanation:

Variation helps organisms survive environmental changes.

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Question (37)

QN008235

Which chromosome combination produces a male child in humans?

(A) XX
(B) YY
(C) XY
(D) XO

Correct Answer: C

Explanation:

XY chromosome combination produces a male child.

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Question (38)

QN008236

If a father contributes X chromosome during fertilisation, the child will be

(A) male
(B) female
(C) sterile
(D) identical twin

Correct Answer: B

Explanation:

XX chromosome combination results in a female child.

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Question (39)

QN008237

Which process creates genetically identical daughter cells during embryo growth?

(A) Meiosis
(B) Fertilisation
(C) Mitosis
(D) Pollination

Correct Answer: C

Explanation:

Mitosis produces genetically identical daughter cells.

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Question (40)

QN008238

Which reproductive feature is most common in aquatic animals?

(A) Internal fertilisation only
(B) External fertilisation
(C) Viviparity only
(D) Budding only

Correct Answer: B

Explanation:

External fertilisation is common in aquatic animals.

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Question (31)

Which animal is viviparous?

Explanation:

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Question (32)

Which animal is oviparous?

Explanation:

Link:

Question (33)

A hen lays 20 eggs and 75% hatch successfully. How many chicks hatch?

Explanation:

Link:

Question (34)

Which reproductive method provides more variation among offspring?

Explanation:

Link:

Question (35)

In external fertilisation, chances of fertilisation are increased by

Explanation:

Link:

Question (36)

Which statement best explains why variation is useful?

Explanation:

Link:

Question (37)

Which chromosome combination produces a male child in humans?

Explanation:

Link:

Question (38)

If a father contributes X chromosome during fertilisation, the child will be

Explanation:

Link:

Question (39)

Which process creates genetically identical daughter cells during embryo growth?

Explanation:

Link:

Question (40)

Which reproductive feature is most common in aquatic animals?

Explanation:

Link:

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