Question

Write speech on
girl child day in Punjabi​ in 50 words

Answer 1

Answer:

In case of Hydra, under favourable

conditions, at specific part of its body, an

outgrowth is formed by repeated divisions of

regenerative cells of body wall. This outgrowth

is called as bud. Bud grows up progressively

and finally forms a small hydra. Dermal layers

and digestive cavity of the budding hydra are

in continuity with those of parent hydra. Parent

hydra supplies nutrition to the budding hydra.

Budding hydra separates from parent hydra and

starts to lead an independent life when it grows

up and becomes able to lead an independent life.

4. Vegetative Propagation

Reproduction in plants with the help of

vegetative parts like root, stem, leaf and bud is

called as vegetative reproduction. Vegetative

propagation in potatoes is performed with

the help of ‘eyes’ present on tuber whereas in

Bryophyllum it is performed with the help of buds

present on leaf margin. In case of plants like

sugarcane & grasses, vegetative propagation

occurs with the help of buds present on nodes.

5. Spore Formation

Take a piece of wet bread or ‘bhakari’ and

keep it in humid place. Fungus will grow on it

within 2 – 3 days. Observe the fungus under

compound microscope and draw its diagram.

Fungi like Mucor have filamentous body. They

have sporangia. Once the spores are formed,

sporangia burst and spores are released. Spores

germinate in moist and warm place and new

fungal colony is formed.

Sweet

Potato

Bryophyllum

Potato

Hydra Bud

Nascent Hydra

3.9 Budding

3.10 Vegetative

reproduction

Sexual Reproduction

Sexual reproduction always occurs with the help of two germ cells. Female gamete and

male gamete are those two germ cells. Two main processes occur in the sexual reproduction.

1. Gamete formation: Gametes are formed by the meiosis. In meiosis, chromosome

number is reduced to half; hence haploid gametes are formed.