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Question (1)

QN0026466

A bacterium divides into two cells every 30 minutes. Starting with one bacterium, how many bacteria will be present after 3 hours?

(A) 16
(B) 32
(C) 64
(D) 128

Correct Answer: C

Explanation:

3 hours = 6 divisions; Number of bacteria = 2⁶ = 64.

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Question (2)

QN0026467

Which reproductive method is most suitable for producing disease-free banana plants rapidly in laboratories?

(A) Seed dispersal
(B) Pollination
(C) Tissue culture
(D) Spore formation

Correct Answer: C

Explanation:

Tissue culture produces healthy identical plants rapidly.

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Question (3)

QN0026468

In hydra, a small outgrowth develops into a new individual. This process is called

(A) fragmentation
(B) budding
(C) regeneration
(D) fertilisation

Correct Answer: B

Explanation:

Hydra reproduces through budding.

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Question (4)

QN0026469

A fungal colony produces 8 million spores. If 75% spores fail to germinate, how many spores successfully germinate?

(A) 1 million
(B) 2 million
(C) 3 million
(D) 4 million

Correct Answer: B

Explanation:

Successful spores = 25% of 8 million = 2 million.

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Question (5)

QN0026470

Which feature mainly distinguishes sexual reproduction from asexual reproduction?

(A) Cell division
(B) Presence of DNA
(C) Fusion of gametes
(D) Growth of organisms

Correct Answer: C

Explanation:

Sexual reproduction involves fusion of gametes.

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Question (6)

QN0026471

A Bryophyllum leaf produces 15 plantlets along its margins. If each plantlet develops into a mature plant, how many new plants are formed from 4 leaves?

(A) 30
(B) 45
(C) 60
(D) 75

Correct Answer: C

Explanation:

15 × 4 = 60 plants.

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Question (7)

QN0026472

Which process is responsible for maintaining chromosome number across generations in sexually reproducing organisms?

(A) Budding and fragmentation
(B) Meiosis and fertilisation
(C) Mitosis only
(D) Binary fission only

Correct Answer: B

Explanation:

Meiosis halves chromosome number and fertilisation restores it.

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Question (8)

QN0026473

If a human zygote divides continuously for 7 mitotic cycles, how many cells will be produced?

(A) 64
(B) 96
(C) 128
(D) 256

Correct Answer: C

Explanation:

Number of cells = 2⁷ = 128.

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Question (9)

QN0026474

Which reproductive structure in males stores and carries sperms?

(A) Ovary
(B) Vas deferens
(C) Uterus
(D) Placenta

Correct Answer: B

Explanation:

Vas deferens stores and carries sperms.

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Question (10)

QN0026475

A menstrual cycle starts on 3rd July and repeats every 28 days. Around which date is the next cycle expected?

(A) 17th July
(B) 31st July
(C) 10th August
(D) 28th August

Correct Answer: B

Explanation:

Adding 28 days to 3rd July gives approximately 31st July.

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Question (1)

A bacterium divides into two cells every 30 minutes. Starting with one bacterium, how many bacteria will be present after 3 hours?

Explanation:

Link:

Question (2)

Which reproductive method is most suitable for producing disease-free banana plants rapidly in laboratories?

Explanation:

Link:

Question (3)

In hydra, a small outgrowth develops into a new individual. This process is called

Explanation:

Link:

Question (4)

A fungal colony produces 8 million spores. If 75% spores fail to germinate, how many spores successfully germinate?

Explanation:

Link:

Question (5)

Which feature mainly distinguishes sexual reproduction from asexual reproduction?

Explanation:

Link:

Question (6)

A Bryophyllum leaf produces 15 plantlets along its margins. If each plantlet develops into a mature plant, how many new plants are formed from 4 leaves?

Explanation:

Link:

Question (7)

Which process is responsible for maintaining chromosome number across generations in sexually reproducing organisms?

Explanation:

Link:

Question (8)

If a human zygote divides continuously for 7 mitotic cycles, how many cells will be produced?

Explanation:

Link:

Question (9)

Which reproductive structure in males stores and carries sperms?

Explanation:

Link:

Question (10)

A menstrual cycle starts on 3rd July and repeats every 28 days. Around which date is the next cycle expected?

Explanation:

Link:

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