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प्रश्न
Sexual maturation of reproductive tissues and organs are necessary link for reproduction. Elucidate.
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उत्तर
Sexual maturation of reproductive tissues is a necessary link for reproduction because of the need for specialised cell called germ-cells to participate in sexual reproduction. The body of the individual organism has to grow to its adult size, the rate of general body growth begins to slow down, reproductive tissues begin to mature.
A whole new set of changes in the appearance of the body takes place like change in body proportions, new features appear. This period during adolescence is called puberty. There are also changes taking place that are different between boys and girls. In girls, breast size begins to increase, with darkening of the skin of the nipples at the tips of the breasts. Also, girls begin to menstruate at around this time. Boys begin to have new thick hair growth on the face and their voices begin to crack.
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संबंधित प्रश्न
Where are the pollen grains produced?
What is the name of female organ of a flower (other than carpel)?
Fill in the following blank with suitable word :
The ovule becomes a .......... after fertilisation.
Fill in the following blank with suitable word :
The name of the structure in the flower in which the male gamete is formed is...........
Explain the terms 'self pollination'
Explain the process of fertilisation in flowers.
Identify the odd. Stigma, Style, Pollen, Ovary.
Draw a diagram of the longitudinal section of a flower and label the following parts.
Distinguish between self-pollination and cross-pollination.
Observe the figure below. Write functions of the labelled parts.

