Question

1. By the end of the __a__ of pregnancy, the foetus develops limbs and digits.

2. By the end of __b_ the body is covered with fine hair, eyelids separate and eyelashes are formed.

3. After ___c____ of pregnancy, the embryo's heart is formed.

• A. a - first month, b - second month, c - first trimester
• B. a - second month, b - first trimester, c - first month
• C. a - second month, b - second trimester, c - first trimester
• D. a - second month, b - second trimester, c - first month

Answer 1

The correct option is D a - second month, b - second trimester, c - first month

Embryo development in the given months:

First month:

After one month of pregnancy, the heart of the embryo is formed.

Second month:

Limbs and digits of the embryo are developed by the end of the second month of pregnancy.

Second trimester:

By the end of the sixth month (second trimester) of pregnancy, the body of the foetus is covered with fine hair, eye lashes are formed and eyelids are separated.

Final answer:

(d) a - second month, b - second trimester, c - first month