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Question (21)

QN008159

Which reproductive strategy creates greater variation among offspring?

(A) Vegetative propagation
(B) Budding
(C) Sexual reproduction
(D) Fragmentation

Correct Answer: C

Explanation:

Sexual reproduction creates genetic variation.

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Question (22)

QN008160

A student removes stamens from a flower bud and covers it with a muslin bag. Which process is prevented directly?

(A) Cross-pollination
(B) Fertilisation
(C) Self-pollination
(D) Seed dispersal

Correct Answer: C

Explanation:

Removal of stamens prevents self-pollination.

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Question (23)

QN008161

In humans, sperm are produced in the

(A) ovary
(B) uterus
(C) testes
(D) prostate gland

Correct Answer: C

Explanation:

Sperm are produced in testes.

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Question (24)

QN008162

The scrotum keeps testes at a lower temperature because

(A) sperm formation requires cooler conditions
(B) urine formation occurs there
(C) hormones are destroyed by heat
(D) fertilisation occurs there

Correct Answer: A

Explanation:

Sperm formation requires a temperature slightly lower than body temperature.

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Question (25)

QN008163

Which gland adds nourishing fluid to sperm?

(A) Thyroid gland
(B) Adrenal gland
(C) Seminal vesicle
(D) Pituitary gland

Correct Answer: C

Explanation:

Seminal vesicles add nourishing fluid to sperm.

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Question (26)

QN008164

The uterus is the site where

(A) sperm are formed
(B) fertilisation always occurs
(C) foetus develops
(D) ovulation occurs

Correct Answer: C

Explanation:

Foetus develops inside the uterus.

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Question (27)

QN008165

Ovulation refers to the release of

(A) sperm from testes
(B) mature egg from ovary
(C) embryo into uterus
(D) hormones from pituitary

Correct Answer: B

Explanation:

Ovulation is the release of a mature egg from ovary.

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Question (28)

QN008166

If a human zygote undergoes 5 mitotic divisions, how many cells will be formed?

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

Correct Answer: B

Explanation:

Number of cells after 5 divisions = 2^5 = 32.

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Question (29)

QN008167

Which structure carries sperm from testes towards urethra?

(A) Oviduct
(B) Vas deferens
(C) Cervix
(D) Ovary

Correct Answer: B

Explanation:

Vas deferens carries sperm towards urethra.

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Question (30)

QN008168

Fertilisation in humans generally occurs in the

(A) P. Maheshwari
(B) Jagadish Chandra Bose
(C) Subhash Mukhopadhyay
(D) Homi Bhabha Answer:

Correct Answer: C

Explanation:

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Question (21)

Which reproductive strategy creates greater variation among offspring?

Explanation:

Link:

Question (22)

A student removes stamens from a flower bud and covers it with a muslin bag. Which process is prevented directly?

Explanation:

Link:

Question (23)

In humans, sperm are produced in the

Explanation:

Link:

Question (24)

The scrotum keeps testes at a lower temperature because

Explanation:

Link:

Question (25)

Which gland adds nourishing fluid to sperm?

Explanation:

Link:

Question (26)

The uterus is the site where

Explanation:

Link:

Question (27)

Ovulation refers to the release of

Explanation:

Link:

Question (28)

If a human zygote undergoes 5 mitotic divisions, how many cells will be formed?

Explanation:

Link:

Question (29)

Which structure carries sperm from testes towards urethra?

Explanation:

Link:

Question (30)

Fertilisation in humans generally occurs in the

Explanation:

Link:

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