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Question (21)

QN008269

The exchange of nutrients and oxygen between mother and foetus occurs through the

(A) ureter
(B) placenta
(C) vas deferens
(D) cervix

Correct Answer: B

Explanation:

Placenta allows exchange of nutrients and oxygen.

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Question (22)

QN008270

If pregnancy lasts 40 weeks approximately, about how many days is it?

(A) 180 days
(B) 220 days
(C) 280 days
(D) 365 days

Correct Answer: C

Explanation:

40 × 7 = 280 days.

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Question (23)

QN008271

Which process marks the release of an egg from ovary?

(A) Fertilisation
(B) Menstruation
(C) Ovulation
(D) Implantation

Correct Answer: C

Explanation:

Ovulation is the release of an egg from ovary.

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Question (24)

QN008272

Menstruation occurs when

(A) fertilisation takes place
(B) egg remains unfertilised
(C) embryo implants successfully
(D) ovulation stops permanently

Correct Answer: B

Explanation:

Menstruation occurs when the egg remains unfertilised.

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Question (25)

QN008273

Which layer is shed during menstruation?

(A) Skin layer
(B) Uterine lining
(C) Ovary wall
(D) Muscle tissue

Correct Answer: B

Explanation:

Uterine lining is shed during menstruation.

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Question (26)

QN008274

A menstrual cycle commonly repeats after approximately

(A) 7 days
(B) 14 days
(C) 28 days
(D) 60 days

Correct Answer: C

Explanation:

Menstrual cycle commonly repeats after 28 days.

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Question (27)

QN008275

If menstruation begins on 5th March in a 28-day cycle, the next cycle is expected around

(A) 19th March
(B) 2nd April
(C) 10th April
(D) 28th April

Correct Answer: B

Explanation:

The next cycle begins about 28 days later, around 2nd April.

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Question (28)

QN008276

In humans, sex of the child is determined by the

(A) mother only
(B) father only
(C) nutrition of mother
(D) age of parents

Correct Answer: B

Explanation:

Father determines the sex of the child.

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Question (29)

QN008277

Which chromosome combination produces a female child?

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

Correct Answer: C

Explanation:

XX chromosome combination produces a female child.

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Question (30)

QN008278

If the father contributes Y chromosome during fertilisation, the child will be

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

Correct Answer: B

Explanation:

XY combination produces a male child.

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Question (21)

The exchange of nutrients and oxygen between mother and foetus occurs through the

Explanation:

Link:

Question (22)

If pregnancy lasts 40 weeks approximately, about how many days is it?

Explanation:

Link:

Question (23)

Which process marks the release of an egg from ovary?

Explanation:

Link:

Question (24)

Menstruation occurs when

Explanation:

Link:

Question (25)

Which layer is shed during menstruation?

Explanation:

Link:

Question (26)

A menstrual cycle commonly repeats after approximately

Explanation:

Link:

Question (27)

If menstruation begins on 5th March in a 28-day cycle, the next cycle is expected around

Explanation:

Link:

Question (28)

In humans, sex of the child is determined by the

Explanation:

Link:

Question (29)

Which chromosome combination produces a female child?

Explanation:

Link:

Question (30)

If the father contributes Y chromosome during fertilisation, the child will be

Explanation:

Link:

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