AP BIOLOGY

Detailed explanation-1: -Natural vegetative propagation occurs by means of roots, underground stems, subaerial stems, aerial shoots, leaves and bulbils. Artificial vegetative propagation occurs by use of special vegetative parts such as root tubers, corm, parts of rhizome etc., or by cutting, layering, grafting and bud grafting.

Detailed explanation-2: -Tissue culture, Cutting, Layering, and Grafting are types of Artificial methods of vegetative propagation.

Detailed explanation-3: -There are several ways of vegetative propagation. The three main types in forest tree propagation are grafting, air-layering and the use of cuttings. The three types are referred to as macropropagation, as alternative to micropropagation or tissue culture.