Initially girls grow faster than boys but at 18 years of age, both reach their maximum height. Given the reason, why?

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Solution

Adolescence:
Adolescence can be defined as the transition period between adulthood and childhood.
The individuals in the age group of 10 to 19 years are called adolescents.
During the period of adolescence, a sudden increase in height is observed in individuals because of the activity of growth hormones.
In the starting, the girls grow faster than boys but by the end of adolescence both reach their maximum height.
Maximum height depends on the genes inherited from parents and the rate of growth in height varies from individual to individual.

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Q. The table below shows the data on likely heights of boys and girls as they grow in age. Draw graphs showing height and age for both boys and girls on the same graph paper. What conclusions can be drawn from these graphs?

Age (Years)	Height (cm) Boys	Height (cm) Girls
$0$	$53$	$53$
$4$	$96$	$92$
$8$	$114$	$110$
$12$	$129$	$133$
$16$	$150$	$150$
$20$	$173$	$165$

The table below shows the data on likely heights of boys and girls as they grow in age. Draw graphs showing height and age for both boys and girls on the same graph paper. What conclusions can be drawn from these graphs?

Age (Years)	Height (cm)
Age (Years)	Boys Girls
0	53	53
4	96	92
8	114	110
12	129	133
16	150	150
20	173	165

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Q. Why do girls have long hair than boys and their hair grows faster

Select the correct statements about increase in height from the following statements.

i. A sudden increase in height is seen during adolescence due to growth hormones.
ii. Girls grow faster than boys initially during adolescence.
iii. At the end of adolescence, maximum height is reached.

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