Question

Given below are events that lead to pregnancy and the development of the embryo.

Which of the following options gives the correct order of sequence in which they occur?

• A. i,ii,iii,iv
• B. ii,i,iii,iv
• C. i,iv,ii,iii
• D. ii,iii,i,iv

Answer 1

The correct option is D

ii,iii,i,iv

The correct option is D.

Explanation for correct option:

The sequence of events that are involved in the development of the embryo are:

1. The maturation of the egg begins at puberty.
2. The egg is released into the oviduct.
3. It is fertilized by the sperm in the oviduct.
4. Upon fertilization, a zygote is formed.
5. The zygote undergoes multiple divisions and moves to the uterus.
6. It becomes a blastocyst when it reaches the uterus.
7. The blastocyst burrows into the uterine lining.
8. This process is known as implantation.

Final answer: The correct order of sequence that leads to pregnancy is ii, iii, i, and iv.