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2. Reaching the Age of Adolescence
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Q6 of 13 Page 159

The human sperm consist of head, middle piece and tail. What purpose does the tail in a sperm serve?

The tail part of the sperm helps in the movement of the sperm towards the egg to carry out fertilization.

Diagram showing structure of a human sperm. The structure is divided into head, mid piece, and tail part.


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4

Give reasons for the following.

Cancerous cells multiply rapidly.

5

Pituitary, thyroid, adrenal, pancreas, testes and ovary. From the glands listed above one gland acts both as exocrine and endocrine. Name it.

7

Babu heard his mother and aunty talking about his cousin who is going to have a baby; they were discussing whether she would give birth to a boy or girl,

a. Will it be possible to judge the sex of the child by them?


b. What makes the fertilized egg develop either into a boy or a girl?

1

How many of your classmates are doing exercises regularly and who do not exercise regularly? Did you notice any difference in their fitness and health? Prepare a chart on their benefits of regular exercise and fix it in your classroom.

Questions · 13
2. Reaching the Age of Adolescence
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