CH 2. Reproduction in plants and animals

Production of plants by cell or tissues or organs in synthetic medium is called tissue culture or micropropagation.

Grafting is similiar to cutting except that the cut plant part is attached on the another plant .

Layering is the development of roots on a stem while it is still attached to parent plant.

In this method, a piece of siutable length of stem is taken from the mother plant. The cutting having nodes and internodes is placed in the moist soil.Roots emerge from basal portion and the bud gives to shoot.

The optimum temperature of scrotum in male reproductive system for production of sperms is 1. to 3. C lower the body temperature.

When man himself transfers pollen grains to the stigma of the flower is called artificial pollination.

Amoeba is reproduce by binary fusion and Paramecium is reproduced by multiple fusion.

The male gamete is known as Pollen grain and the female gamete is known as Ovule.

Full term of development of embryo in the uterus (about 280 days).

Solution : Sperm– Motile consist of neck, middle piece and tail. Ovum –Non-motile and round in structure.