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प्रश्न
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 | Girls | |
| 0 | 53 | 53 |
| 4 | 96 | 92 |
| 8 | 11 | 110 |
| 12 | 129 | 133 |
| 16 | 150 | 150 |
| 20 | 173 | 165 |
उत्तर
From birth, both girls and boys are the same height. Girls become shorter than guys as they get older. Girls get taller than males when they reach the age of 12 (puberty age for girls), and this continues until the age of 15. At 16, both reach the same height. At the age of 20, girls again become shorter than boys.
It indicates that puberty causes a dramatic increase in height due to the development of long bones in the legs and arms. Initially, girls develop quicker than boys, but by age 18, both boys and girls have reached their maximum height, with girls generally being shorter than boys.
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संबंधित प्रश्न
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Adolescence is the period of life between _______ years of age.
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Match the following.
| Puberty | Testosterone |
| Adam’s apple | Muscle development |
| Androgen | at 45 to 50 years of age |
| ICSH | Sexual maturity |
| Menopause | Change in voice |
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| deep | ductless | nutrients | thyroxine |
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- After attaining puberty, boys develop a ______ voice.
