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Question (11)

QN008259

Fertilisation in humans usually occurs in the

(A) uterus
(B) vagina
(C) oviduct
(D) ovary

Correct Answer: C

Explanation:

Fertilisation usually occurs in the oviduct.

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Question (12)

QN008260

Fusion of sperm and egg forms a

(A) foetus
(B) embryo
(C) zygote
(D) ovule

Correct Answer: C

Explanation:

Fusion of sperm and egg forms a zygote.

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Question (13)

QN008261

If a human body cell has 46 chromosomes, how many chromosomes will be present in a sperm cell?

(A) 92
(B) 46
(C) 23
(D) 12

Correct Answer: C

Explanation:

Gametes contain half the chromosome number, i.e. 23.

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Question (14)

QN008262

Which process reduces chromosome number to half in gametes?

(A) Mitosis
(B) Budding
(C) Binary fission
(D) Meiosis

Correct Answer: D

Explanation:

Meiosis reduces chromosome number to half.

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Question (15)

QN008263

If a zygote undergoes 3 mitotic divisions, how many cells will be formed?

(A) 4
(B) 6
(C) 8
(D) 16

Correct Answer: C

Explanation:

Number of cells formed = 2³ = 8.

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Question (16)

QN008264

The uterus is the place where

(A) sperms are formed
(B) embryo develops
(C) fertilisation occurs
(D) hormones are destroyed

Correct Answer: B

Explanation:

Embryo develops inside the uterus.

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Question (17)

QN008265

Implantation means

(A) release of egg
(B) attachment of embryo to uterus wall
(C) fusion of gametes
(D) sperm production

Correct Answer: B

Explanation:

Implantation is attachment of embryo to uterus wall.

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Question (18)

QN008266

Which stage follows the embryo stage in humans?

(A) Gamete
(B) Ovule
(C) Foetus
(D) Zygote

Correct Answer: C

Explanation:

Foetus stage follows embryo stage.

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Question (19)

QN008267

Human pregnancy generally lasts about

(A) 3 months
(B) 6 months
(C) 9 months
(D) 12 months

Correct Answer: C

Explanation:

Human pregnancy generally lasts about 9 months.

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Question (20)

QN008268

Which organ nourishes the developing embryo during pregnancy?

(A) Kidney
(B) Placenta
(C) Lung
(D) Liver

Correct Answer: B

Explanation:

Placenta nourishes the developing embryo.

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Question (11)

Fertilisation in humans usually occurs in the

Explanation:

Link:

Question (12)

Fusion of sperm and egg forms a

Explanation:

Link:

Question (13)

If a human body cell has 46 chromosomes, how many chromosomes will be present in a sperm cell?

Explanation:

Link:

Question (14)

Which process reduces chromosome number to half in gametes?

Explanation:

Link:

Question (15)

If a zygote undergoes 3 mitotic divisions, how many cells will be formed?

Explanation:

Link:

Question (16)

The uterus is the place where

Explanation:

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Question (17)

Implantation means

Explanation:

Link:

Question (18)

Which stage follows the embryo stage in humans?

Explanation:

Link:

Question (19)

Human pregnancy generally lasts about

Explanation:

Link:

Question (20)

Which organ nourishes the developing embryo during pregnancy?

Explanation:

Link:

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