Q42. Explain reproduction through spore formation in fungus.
on a bread piece grow from spores which are present in the air. When
spores are released they keep floating in the air. As they are very light they
can cover long distances. Spores are asexual reproductive bodies. Each spore is
covered by a hard protective coat to withstand unfavourable conditions such as
high temperature and low humidity. So they can survive for a long time. Under
favourable conditions, a spore germinates and develops into a new individual.
Image From NCERT
Q43. Describe the different methods of asexual reproduction.
Different methods of asexual reproduction
propagation - It is a type of asexual reproduction in which
new plants are produced from roots, stems, leaves and buds. Example - Bryophyllum
(sprout leaf plant) has buds in the margins of leaves. If a leaf of this plant
falls on a moist soil, each bud can give rise to a new plant.
It is a form of asexual reproduction in which an organism is split into
fragments. Each of these fragments develop into matured, fully grown
individuals that are clones of the original organism. Example – When water and
nutrients are available algae grow and multiply rapidly by fragmentation.
Formation – The spores are asexual reproductive bodies. In spore
formation parent plant produces tiny spores which can then produce new plants.
such as moss and ferns also reproduce by means of spores.
Budding is a type of asexual reproduction in which a new organism develops from
an outgrowth or bud due to cell division at one particular site. The small bulb
like projection coming out from the yeast cell is called a bud. Example
yeasts reproduce asexually by an asymmetric division process called budding.