10th Class Science Human Reproduction Reproduction

Reproduction

Category : 10th Class

 Reproduction

 

 

  • The phenomenon of the formation of new individuals from the existing ones to increase the population is called reproduction.

 

  • The process of reproduction ensures the continuity of a race and the perpetuation of characteristics of the species and particularly the parent organisms.

 

  • Reproduction can be broadly grouped into two types: asexual reproduction and sexual reproduction.

 

  • Sexual reproduction is the process during which a new individual is formed by the fusion of a male reproductive cell with a female reproductive cell.

 

  • Asexual reproduction is a mode of reproduction by which offsprings arise from a single parent and inherit the genes of that parent only.

 

  • Fertilisation is the fusion of gametes to produce a new organism.

 

  • Various organisms use different modes of reproduction depending on their body design.

 

  • Different forms of asexual reproduction :

 

Binary fission

e.g., amoeba.

Budding

e.g., hydra.

Spore formation

e.g., fungi, fern and moss.

Vegetative reproduction

e.g., bulb of onion, stem tuber, etc.

Regeneration

e.g., planaria, starfish etc.

 

  • The roots, stems and leaves of some plants develop into new plants through vegetative propagation.

 

  • The different parts of the human male reproductive system are seminal vesicle, scrotum, penis, testis, prostate gland, sperm duct, sperm (male gamete).

 

  • Parts of the human female reproductive system are uterus, cervix, fallopian tube, ovary, vagina.

 

  • Reproduction in flowering plants involves pollination or the transfer of pollen grains from the anther to the stigma. This is followed by fertilisation.

Notes - Reproduction
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