Question

Choose the correct sequence
a)zygote, fertilization, ball of cells, foetus, embryo
b)Fertilisation, ball of cells, foetus, zygote, embryo

c) Ball of cells, zygote, fertilization, embryo, foetus
d) Fertilisation, zygote, ball of cells, embryo, foetus​

Answer 1

Answer:

Explanation:

Option (d)

Answer 2

Answer:

• The correct option is option d.) fertilization, zygote, ball of cells, embryo, foetus.

Explanation:

• The first step after the formation of gametes is the fusion of male and female gametes, that is the fusion of sperm and ovum is called as fertilization.

• The product of this fusion is called as zygote.

• Zygote undergoes repeated mitosis division forming a ball of cells called as Morulla.

• This cells then forms embryo.

• In the 11th week of pregnancy is termed as foetus.

• Therefore, the correct sequence is fertilization, zygote, ball of cells, embryo, and foetus.