Question

C2. Fill in the blanks.


1. The structure formed by the fusion of a male gamete with a female gamete is called______
2. In humans, fertilization is________
3._____animals are those which lay eggs.
4. In humans, male reproductive organs are_____, ____ and ____
5. In humans, sperms are produced by________
and eggs are produced by
6. Different stages in the life cycle of a butterfly are eggs, ____,_____
and_____
buy. (Give the stages in sequence.)
7. X and Y chromosomes are called ______
8. Chemical substances secreted by endocrine glands are called ____.
9.______gland is called the master gland.
10. Maturation of reproductive organs takes place during______
11. Voice box is _____
in boys than that in girls.
12. Secondary sexual characters start developing during_____

Answer 1

Answer:

1. zygote

2. taken place inside the female's body

3. oviparous animals lay eggs

4. penis, vas deferens, and testis are the main male reproductive organs in human.

5. sperms are produced by males, it is produced by testis

6. egg, larva, pupa and adult

7. X and Y chromosomes are called sex chromosomes

8.  hormones

9. pituitary glands  are called master glands.

10. puberty and early stages of  adolescence

11. larger

12. puberty

Explanation: