what are the main points of NS ch-6 reproduction-the generating system
Answers
Answer:
The male reproductive system consists of a pair of testis, It is very vital for natural selection in evolution of species. ... Sexual reproduction plays an important role in the origin
Answer:
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Explanation:
1. Reproduction is necessary for perpetuation of continuation of e 2. In sexual reproduction only half of each parents chromosomes are passed to the next generation.
3 Fission, budding, fragmentation, regeneration, spore formation are the asexual reproduction.
4. Reproduction is of two types keeping in view of gametes-Sexual and Asexual
5. Several plants may be grown from vegetative parts like stems, roots leaves etc and is called vegetative propagation
6. In grafting we can acquire desirable character of plants
7. Tissue culture is a modern technique of growing plants. It helps to grow mone plants in less time and place.
8. Sexual reproduction in higher animals is through specialised organs, distinctively male and female reproductive system
9. Vegetative propagation may be natural or man made. It has some economic importance
10. Cells divide for growth of the individual to repair and replace the worn out cells and also for the formation of gametes
H. Cell division is of two types: (a) Mitosis or Somatic cell division (b) Meiosis Reproductive cell division (or) Reduction division.
12. The cell of the body may either be somatic cells that constitute the general body d the organism or germ cells that take part in formation of gametes
13. The longest phase is the synthesis phase in cell cycle where duplication of geneti material takes place.