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Question (11)

QN0026476

Which adaptation mainly helps spores survive unfavourable conditions?

(A) Thin covering
(B) Absence of nucleus
(C) Thick protective wall
(D) Presence of roots

Correct Answer: C

Explanation:

Thick protective walls help spores survive harsh conditions.

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Question (12)

QN0026477

A fish releases 50,000 eggs in water. If only 0.2% survive to adulthood, how many adult fish are formed?

(A) 10
(B) 50
(C) 100
(D) 500

Correct Answer: C

Explanation:

0.2% of 50,000 = 100 adult fish.

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Question (13)

QN0026478

Which statement best explains why variation is beneficial in nature?

(A) It decreases survival rate
(B) It prevents reproduction
(C) It improves adaptation during environmental changes
(D) It stops natural selection

Correct Answer: C

Explanation:

Variation improves chances of adaptation and survival.

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Question (14)

QN0026479

A potato tuber with 6 buds is cut into pieces such that each piece has one bud. How many new potato plants can potentially grow?

(A) 3
(B) 4
(C) 5
(D) 6

Correct Answer: D

Explanation:

Each bud can develop into a new potato plant.

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Question (15)

QN0026480

Which condition is most suitable for rapid mould growth on bread?

(A) Cold and dry environment
(B) Warm and moist environment
(C) Hot and dry environment
(D) Freezing temperature

Correct Answer: B

Explanation:

Warm and moist conditions favour mould growth.

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Question (16)

QN0026481

In humans, if the father contributes an X chromosome and the mother contributes X chromosome, the child will be

(A) male
(B) female
(C) sterile
(D) genetically identical to father

Correct Answer: B

Explanation:

XX chromosome combination produces a female child.

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Question (17)

QN0026482

A farmer wants identical rose plants with desirable flower colour. Which method is most appropriate?

(A) Seed germination
(B) Vegetative propagation
(C) Cross-pollination
(D) External fertilisation

Correct Answer: B

Explanation:

Vegetative propagation produces identical plants with desired traits.

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Question (18)

QN0026483

Which event occurs immediately after fertilisation in humans?

(A) Menstruation
(B) Implantation
(C) Formation of zygote
(D) Ovulation

Correct Answer: C

Explanation:

Fertilisation immediately forms a zygote.

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Question (19)

QN0026484

A species has 80 chromosomes in its body cells. How many chromosomes will each gamete contain?

(A) 20
(B) 40
(C) 80
(D) 160

Correct Answer: B

Explanation:

Gametes contain half the chromosome number, i.e. 40.

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Question (20)

QN0026485

Which reproductive strategy is most commonly associated with producing many offspring but providing little parental care?

(A) Internal fertilisation with viviparity
(B) External fertilisation in aquatic animals
(C) Vegetative propagation in plants
(D) Tissue culture in laboratories

Correct Answer: B

Explanation:

Aquatic animals with external fertilisation produce many offspring with little parental care.

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Question (11)

Which adaptation mainly helps spores survive unfavourable conditions?

Explanation:

Link:

Question (12)

A fish releases 50,000 eggs in water. If only 0.2% survive to adulthood, how many adult fish are formed?

Explanation:

Link:

Question (13)

Which statement best explains why variation is beneficial in nature?

Explanation:

Link:

Question (14)

A potato tuber with 6 buds is cut into pieces such that each piece has one bud. How many new potato plants can potentially grow?

Explanation:

Link:

Question (15)

Which condition is most suitable for rapid mould growth on bread?

Explanation:

Link:

Question (16)

In humans, if the father contributes an X chromosome and the mother contributes X chromosome, the child will be

Explanation:

Link:

Question (17)

A farmer wants identical rose plants with desirable flower colour. Which method is most appropriate?

Explanation:

Link:

Question (18)

Which event occurs immediately after fertilisation in humans?

Explanation:

Link:

Question (19)

A species has 80 chromosomes in its body cells. How many chromosomes will each gamete contain?

Explanation:

Link:

Question (20)

Which reproductive strategy is most commonly associated with producing many offspring but providing little parental care?

Explanation:

Link:

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