2. Reproduction in lower and higher animals.
Reproduction is one of the major life processes of any living organism
which helps in maintaining the continuity of the species.
Reproduction is
defined as the biological process of formation of new life forms from
pre-existing similar life.
It thus becomes a vital process which enables the
species to survive over a long period, even though the individuals or organisms
live naturally for a limited period of time i.e. their life span.
Reproduction in Animals occurs mainly by two methods i.e.
asexual and sexual.
Asexual
reproduction
|
Sexual
reproduction
|
|
1
|
It is uniparental
|
It is biparental
|
2
|
Gametes
are not required
|
Gametes
are required
|
3
|
Only
mitotic division takes place
|
Mitotic
and meiotic division takes place
|
4
|
Somatic cells are involved
|
Germ cells are involved
|
5
|
It is faster
than sexual reproduction
|
It is slower
than asexual reproduction
|
6
|
Whole
body or bud or fragment of body is required
|
Gametes
are required
|
7
|
It is
observed in lower animals
|
It is observed
in higher animals
|
