Tamil Nadu Board Solutions for Chapter: Reproduction in Plants and Animals, Exercise 1: TEXTBOOK EVALUATION

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With a neat labelled diagram describe the parts of a typical angiosperm ovule.

What are the phases of the menstrual cycle? Indicate the changes in the ovary and uterus.

In angiosperms, the pollen germinates to produce a pollen tube that carries two gametes. What is the purpose of carrying two gametes when single gamete can fertilize the egg?

Why menstrual cycle does not take place before puberty and during pregnancy?

Read the following passage and answer the questions that follow

Rahini and her parents were watching a television programme. An advertisement flashed on the screen which was promoting the use of sanitary napkins. Rahini's parents suddenly changed the channel, but she objected to her parents and explained the need and importance of such advertisement.

a) What is first menstruation called? When does it occur?

Read the following passage and answer the questions that follow

Rahini and her parents were watching a television programme. An advertisement flashed on the screen which was promoting the use of sanitary napkins. Rahini's parents suddenly changed the channel, but she objected to her parents and explained the need and importance of such advertisement.

b) List out the napkin hygiene measures taken during menstruation.

Read the following passage and answer the questions that follow

Rahini and her parents were watching a television programme. An advertisement flashed on the screen which was promoting the use of sanitary napkins. Rahini's parents suddenly changed the channel, but she objected to her parents and explained the need and importance of such advertisement.

c) Do you think that Rahini's objection towards her parents was correct? Is so, why?