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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
Sketch the reproductive parts of a flower.
State the name of the functional unit concerned with sexual reproduction.
Name the male part of the flower.
What are the reproductive organs in a flower?
Where is the male gamete formed in flowering plants?
In tobacco plant, the male gametes have 24 chromosomes.
What is the number of chromosomes in the female gamete?
Multiple choice question. Tick (✓) the correct choice:
The male gamete is present inside the which germinates.
- the style
- the stigma
- the anther
- the ovary
List any two differences between pollination and fertilization.
Define.
Inflorescence
The number of pollen sacs in a dithecous anther is ______.
