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By Savita S. More

Chhattisgarh Board Class 8 Science Chapter 17 Solution

Last updated on February 9th, 2024 at 04:38 pm

 

Q: Mention the main characteristics of adolescence?
Adolescence involves rapid growth, the onset of puberty, the development of secondary sexual characteristics, intellectual development, emotional changes, and complex decision making.

 

Q: What are the reasons of acne and pimples on the face of adolescents?
Acne and pimples in teens are caused by increased activity of sweat and oil glands, hormonal changes, genetics, and skin care habits.

 

Q: What are the main differences between viviparous and oviparous animals?
Viviparous animals give birth to live offspring, but egg-laying animals have different reproductive strategies.

 

Q: What is fertilisation? Explain
Fertilization is a process during which a male sperm cell fuses with a female egg cell, forming a zygote, which is the initial stage of development of a new organism. This can happen internally or externally, depending on the reproductive process of the species.

 

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