Class 7 Exam > Class 7 Videos > Science (Curiosity) Class 7 - New NCERT > The Secondary Sexual Characters
The Secondary Sexual Characters Video Lecture | Science (Curiosity) Class 7 - New NCERT
FAQs on The Secondary Sexual Characters Video Lecture - Science (Curiosity) Class 7 - New NCERT
| 1. What are secondary sexual characteristics? |  |
Ans.Secondary sexual characteristics are features that appear during puberty, distinguishing the two sexes of a species but not directly involved in reproduction. In humans, examples include breast development in females and facial hair in males.
| 2. How do secondary sexual characteristics develop? | |
Ans.Secondary sexual characteristics develop due to hormonal changes in the body during puberty. In boys, testosterone leads to features like increased muscle mass and deepening of the voice, while in girls, estrogen promotes breast development and wider hips.
| 3. Why are secondary sexual characteristics important? | |
Ans.Secondary sexual characteristics play a crucial role in sexual attraction and reproductive behaviors. They signal maturity and readiness for reproduction, which can influence mate selection in many species.
| 4. At what age do secondary sexual characteristics typically appear? | |
Ans.Secondary sexual characteristics usually begin to appear during puberty, which typically starts between ages 9 to 14 in girls and 10 to 15 in boys. However, the exact age can vary widely among individuals.
| 5. Can environmental factors influence secondary sexual characteristics? | |
Ans.Yes, environmental factors such as nutrition, physical activity, and overall health can influence the timing and development of secondary sexual characteristics. For example, a well-balanced diet can promote healthy growth during puberty.
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