Question

2.how many pair of chromosomes are there
3.which is the age of adolescence starting age​
this urgent please

Answer 1

Answer:

2)23 pairs

In humans, each cell normally contains 23 pairs of chromosomes, for a total of 46. Twenty-two of these pairs, called autosomes, look the same in both males and females. The 23rd pair, the sex chromosomes, differ between males and females.

3)Adolescence begins with the onset of physiologically normal puberty, and ends when an adult identity and behaviour are accepted. This period of development corresponds roughly to the period between the ages of 10 and 19 years, which is consistent with the World Health Organization's definition of adolescence.

Explanation:

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Answer 2

Answer:

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