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Question (41)

QN0036162

If the egg is not fertilised, what happens to the thickened uterine lining after it is no longer required?

(A) It becomes a zygote
(B) It remains permanently unchanged
(C) It breaks down and is discharged through the vagina
(D) It becomes the placenta

Correct Answer: C

Explanation:

The uterine lining breaks down and is discharged through the vagina during menstruation.

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Question (42)

QN0036163

A menstrual cycle begins approximately once every month. If menstruation lasts for 6 days in a particular cycle, which statement is consistent with the chapter?

(A) This duration is outside the stated range
(B) This duration falls within the usual range described
(C) Menstruation must always last exactly 1 day
(D) Menstruation must always last exactly 14 days

Correct Answer: B

Explanation:

The chapter states that menstruation usually lasts about 2 to 8 days, so 6 days falls within this range.

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Question (43)

QN0036164

Suppose an egg remains viable for approximately one day after release. Which conclusion is most directly supported?

(A) Fertilisation can occur only when a viable egg is available
(B) The egg remains viable for several months
(C) Menstruation stops permanently after one egg is released
(D) The egg immediately becomes an embryo without fertilisation

Correct Answer: A

Explanation:

Fertilisation requires a viable female germ-cell, and the chapter states that an unfertilised egg lives for about one day.

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Question (44)

QN0036165

A contraceptive method prevents sperm from reaching the egg by creating a physical barrier. Which category does it belong to?

(A) Mechanical barrier method
(B) Hormonal method
(C) Surgical method involving the uterus only
(D) Tissue culture

Correct Answer: A

Explanation:

Barrier methods prevent sperm from reaching the egg by creating a physical barrier.

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Question (45)

QN0036166

A contraceptive pill is designed to alter hormonal balance so that eggs are not released. What is the immediate reproductive consequence intended by this method?

(A) Increased pollen formation
(B) Prevention of fertilisation
(C) Formation of additional embryos
(D) Increased sperm production

Correct Answer: B

Explanation:

Oral contraceptive pills alter hormonal balance and can prevent egg release, thereby preventing fertilisation.

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Question (46)

QN0036167

A contraceptive device is placed inside the uterus and is described in the chapter as a copper-T. Which statement is correct?

(A) It is a method of vegetative propagation
(B) It is an intrauterine contraceptive device
(C) It is a treatment for bacterial infections
(D) It increases the number of eggs released

Correct Answer: B

Explanation:

Copper-T is a contraceptive device placed inside the uterus.

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Question (47)

QN0036168

In a hypothetical case, the vas deferens is blocked while sperm production in the testes continues normally. Which process is most directly prevented?

(A) Production of sperm
(B) Transfer of sperm
(C) Production of testosterone
(D) Production of eggs

Correct Answer: B

Explanation:

Blocking the vas deferens prevents the transfer of sperm.

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Question (48)

QN0036169

In another hypothetical case, the fallopian tube is blocked. Which event is most directly prevented?

(A) Production of eggs by the ovary
(B) Movement of the egg through the fallopian tube and normal fertilisation
(C) Production of sperm by testes
(D) Formation of the uterine lining

Correct Answer: B

Explanation:

The fallopian tube carries the egg and is the usual site of fertilisation.

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Question (49)

QN0036170

A couple wants to reduce the risk of both unintended pregnancy and transmission of many sexually transmitted infections. Which method mentioned in the chapter addresses both concerns to some extent?

(A) Copper-T alone
(B) Oral pills alone
(C) Condom
(D) Blocking the fallopian tube alone

Correct Answer: C

Explanation:

Condoms help prevent pregnancy and reduce transmission of many sexually transmitted infections.

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Question (50)

QN0036171

A species reproduces asexually for many generations. Its environment then changes drastically. Another population of the same species has accumulated greater variation through sexual reproduction. Which conclusion is best supported by the chapter?

(A) Variation can increase the possibility that some individuals survive environmental changes
(B) Asexual reproduction always causes extinction
(C) Sexual reproduction prevents all harmful changes
(D) Variation has no relationship with survival of species

Correct Answer: A

Explanation:

Variations can help some individuals survive when environmental conditions change.

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Question (41)

If the egg is not fertilised, what happens to the thickened uterine lining after it is no longer required?

Explanation:

Link:

Question (42)

A menstrual cycle begins approximately once every month. If menstruation lasts for 6 days in a particular cycle, which statement is consistent with the chapter?

Explanation:

Link:

Question (43)

Suppose an egg remains viable for approximately one day after release. Which conclusion is most directly supported?

Explanation:

Link:

Question (44)

A contraceptive method prevents sperm from reaching the egg by creating a physical barrier. Which category does it belong to?

Explanation:

Link:

Question (45)

A contraceptive pill is designed to alter hormonal balance so that eggs are not released. What is the immediate reproductive consequence intended by this method?

Explanation:

Link:

Question (46)

A contraceptive device is placed inside the uterus and is described in the chapter as a copper-T. Which statement is correct?

Explanation:

Link:

Question (47)

In a hypothetical case, the vas deferens is blocked while sperm production in the testes continues normally. Which process is most directly prevented?

Explanation:

Link:

Question (48)

In another hypothetical case, the fallopian tube is blocked. Which event is most directly prevented?

Explanation:

Link:

Question (49)

A couple wants to reduce the risk of both unintended pregnancy and transmission of many sexually transmitted infections. Which method mentioned in the chapter addresses both concerns to some extent?

Explanation:

Link:

Question (50)

A species reproduces asexually for many generations. Its environment then changes drastically. Another population of the same species has accumulated greater variation through sexual reproduction. Which conclusion is best supported by the chapter?

Explanation:

Link:

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