Question

Vegetative propagation in Pistia ,Water Hyacinth occurs by
A. Sucker
B. Runner
C. Offset
D. Stolon

Answer 1

Hint: Vegetative proportion is a form of asexual reproduction, which occurs in plants, where plants grow from any part or fragment of parent plant, many plants reproduce in this way, and some of the aquatic plants such as pistia and water hyacinth propagate vegetatively.

Complete step by step answer: Pistia is a representative of aquatic plant genus, which belongs to the family araceae, and hyacinth is also an aquatic plant, where in both of them occurs in a common way.
Sucker: It is one type of vegetative propagation, and these are also known as root sprouts.
Suckers are nothing but plant stems which arise from buds, that are based on parent plants, such as stems or roots.
Some of the examples of plants that propagate by suckers are apples, bananas, etc. So this is the wrong option.
Runner: This are also known as stolons, where both in runners and stolons same type of propagation occurs, these are not like rhizomes, where these are grow from existing stems just below the soil surface as they propagate, the buds on modified stems produce roots and stems, examples such as strawberries, currants, so this is also wrong option.
Offsets: These are regions which are formed from a meristematic region of plants, some of the examples like axillary buds or homologous buds where they undergo differentiation into new plants, so offsets have an ability of sustainability.
When coming to pistia and water hyacinth, the process of vegetative propagation occurs by offsets such as one internode appears to run horizontally along the surface of the soil and they ultimately give rise to new plants which may arise either axillary or terminal buds.
So the correct answer is offset.

Note: Vegetative propagation not only occurs in a natural way, where it also be induced or occurs artificially by scientist, and in this methods plants are reproduced a sexually by vegetative parts and they divide by mitosis and replicate, so that process is also called as cloning.