Question

Aultiple Choice Questions (MCQs): Choose the correct answer for each of the following.
1. Asexual reproduction occurs in
(a) humans.
(b) amoeba.
(c) cat.
(d) elephant.
External fertilization takes place in
(a) frog.
(b) humans.
(c) butterfly
(d) bird.
Which of the following is a viviparous animal?
(b) Butterfly
(C) Human being
(d) Frog
In humans, the development of embryo takes place in
(a) ovaries.
(b) oviducts.
(c) uterus.
(d) none of the above organs.
5. Human body cells contain
pair of chromosomes.
(b) 22
(c) 24
(d) 21
(a) Hen
(a) 23
6. The stage when the reproductive organs reach sexual maturity is called
(a) fertilization. (b) menstruation. (c) puberty.
(d) menarche.
7. The hormone which regulates development of secondary sexual characters in males is
(a) testosterone. (b) adrenaline. (c) estrogen.
(d) pituitary.
8. Metamorphosis in frogs is controlled by
(a) adrenation. (b) thyroxine.
(c) growth hormone. (d) insulin.​

Answer 1

Answer:

Explanation:

1. b) amoeba

2. a) Frog

3. c) Human being

4. c) uterus

5. a) 23  pair chromosome

and total 46 chromosome

6. c) puberty

7. a ) testosterone

8. b) thyroxine

all are correct

Answer 2

Answer:

1. ameoba

2.humans

3.frog

4.uterus

5.22

6.fertilisation

7.estrogen

8.growth hormone