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Question (1)

QN008199

Variation in reproduction mainly helps organisms to

(A) stop growth
(B) adapt to changing environments
(C) prevent cell division
(D) eliminate chromosomes

Correct Answer: B

Explanation:

Variations help organisms adapt to changing environments.

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Question (2)

QN008200

Which type of reproduction generally produces greater variation?

(A) Budding
(B) Binary fission
(C) Vegetative propagation
(D) Sexual reproduction

Correct Answer: D

Explanation:

Sexual reproduction produces greater variation.

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Question (3)

QN008201

Variations are mainly caused by

(A) identical cell division only
(B) exchange and recombination of genes
(C) absence of fertilisation
(D) spore formation only

Correct Answer: B

Explanation:

Gene recombination creates variations.

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Question (4)

QN008202

Which process ensures half chromosome number in gametes?

(A) Mitosis
(B) Binary fission
(C) Meiosis
(D) Budding

Correct Answer: C

Explanation:

Meiosis reduces chromosome number to half.

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Question (5)

QN008203

If a parent organism has 48 chromosomes, how many chromosomes will each gamete contain?

(A) 96
(B) 48
(C) 24
(D) 12

Correct Answer: C

Explanation:

Gametes contain half the chromosome number. Half of 48 is 24.

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Question (6)

QN008204

Which statement best explains why offspring from sexual reproduction are not identical to parents?

(A) Gametes are absent
(B) Genes from two parents combine
(C) Mitosis halves chromosome number
(D) Fertilisation never occurs

Correct Answer: B

Explanation:

Combination of genes from two parents causes variation.

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Question (7)

QN008205

In humans, male gametes are produced in the

(A) ovaries
(B) uterus
(C) testes
(D) oviducts

Correct Answer: C

Explanation:

Testes produce male gametes or sperms.

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Question (8)

QN008206

Which reproductive variation is seen in frogs?

(A) Internal fertilisation with few eggs
(B) External fertilisation with many eggs
(C) Budding only
(D) Vegetative propagation

Correct Answer: B

Explanation:

Frogs show external fertilisation and produce many eggs.

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Question (9)

QN008207

Frogs release thousands of eggs mainly because

(A) fertilisation is absent
(B) many eggs do not survive
(C) all eggs become adults
(D) frogs reproduce asexually

Correct Answer: B

Explanation:

Many eggs fail to survive in external fertilisation.

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Question (10)

QN008208

If a fish lays 8000 eggs and only 1% survive, how many young fish survive?

(A) 8
(B) 40
(C) 80
(D) 800

Correct Answer: C

Explanation:

1% of 8000 = 80 surviving fish.

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Question (1)

Variation in reproduction mainly helps organisms to

Explanation:

Link:

Question (2)

Which type of reproduction generally produces greater variation?

Explanation:

Link:

Question (3)

Variations are mainly caused by

Explanation:

Link:

Question (4)

Which process ensures half chromosome number in gametes?

Explanation:

Link:

Question (5)

If a parent organism has 48 chromosomes, how many chromosomes will each gamete contain?

Explanation:

Link:

Question (6)

Which statement best explains why offspring from sexual reproduction are not identical to parents?

Explanation:

Link:

Question (7)

In humans, male gametes are produced in the

Explanation:

Link:

Question (8)

Which reproductive variation is seen in frogs?

Explanation:

Link:

Question (9)

Frogs release thousands of eggs mainly because

Explanation:

Link:

Question (10)

If a fish lays 8000 eggs and only 1% survive, how many young fish survive?

Explanation:

Link:

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