Question

Which change is common in both boys and girls at puberty?

• A. The appearance of beards and moustaches
• B. Enlargement of mammary glands
• C. Hoarseness of voice
• D. Thick hair growth in armpits

Answer 1

The correct option is D

Thick hair growth in armpits

The correct option is D. Thick hair growth in armpits.

Explanation of the correct option:

1. The body of humans undergoes several physical and biological changes during puberty.
2. Some of the changes at puberty are common and observed in both males and females such as thick hair growth in the armpits, hair growth on the hands and legs, etc.

Explanations of the incorrect options:

Option A.

1. The appearance of mustaches and beards is observed in males at puberty.
2. This change occurs due to a hormone called testosterone.

Option B.

1. Enlargement of mammary glands is observed only in females at puberty.
2. It occurs due to two hormones in females called progesterone and estrogen.

Option C.

1. Hoarseness of voice is observed in males and occurs majorly due to enlargement of the larynx.
2. The hormone that causes this change in males at puberty is testosterone.

Therefore, the change that is common in both boys and girls at puberty is thick hair growth in the armpits.