|Class 12 Biology Reproduction In Organisms||Asexual reproduction|
Modes of asexual reproduction
Example- Amoeba, Paramecium.
Fig. binary fission in amoeba
Fig. budding in yeast
Asexual reproductive structures-
In plants, the vegetative parts of the body of the plant called as vegetative propagules give rise to new offspring
Example- runner, rhizome of ginger, suckers of chrysanthemum, offset of water hyacinth, bulb of onion, eyes of potato can give rise to new offspring.
Vegetative propagules develop from some other specialized parts present in the vegetative propagules.
Example- eyes of potato, rhizomes of banana, ginger arise from nodes present in the modified stem of these plants , adventitious buds of Bryophyllum arise from the notches present at margin of leaves.
As the progenies arise from a single parent, the progenies do not show genetic variation and do not contribute to evolution.