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Bacacay East Central School
Bacacay, Albay
GRADE V

SCIENCE OUTPUT

Asexual
Reproduction in Animals

Richard Earl B
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Since there is no mixing of genetic information required and organisms don’t need to
spend time finding a mate, populations can increase rapidly due to asexual reproduction
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While asexual reproduction is typically reserved for unicellular organisms and plants, there are several members of
the animalia kingdom that reproduce asexually
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Features of Asexual Reproduction
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In asexual reproduction, only one parent is involved
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There is no involvement of gamete formation and fertilization
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There is no variation in this reproduction, as offspring organisms are carbon copies of their parents
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1
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In this, the genetic material is passed
‘horizontally’ from one organism to another instead of ‘vertically’ from parent to
the child
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2
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This species of lizard was created by
the hybridization of two neighboring species
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 Binary Fusion – Bacteria and amoeba are the main organisms in which this method of reproduction is seen
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Hence, the parent cell divides into two identical daughter cells and these cells are identical to the parent cell
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For instanceAmoeba

ii) Longitudinal Binary Fission – It occurs in Flagellates such as
Euglena
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iv) Oblique Binary Fission – It occurs in
Cerium
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One of the most common examples of this
mode of asexual reproduction is Starfish
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 Budding – In this mode of reproduction, the offspring develops on the body of the parent just like a bud
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Here, the bud falls of the parent
body and starts its own independent existence
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This growing bud splits away from the parent and
takes an independent existence
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ii) Endogenous/ Internal Budding – A few marine sponges buds are formed within the
parent’s body in freshwater sponges (e
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Spongilla)
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Partitioned part of the body is called a strobila (i
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scyphistoma) larva and each segment is called an ephyra larva as
found in Aurelia (a coelenterate)
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Lizards, some fishes, and insects are the common examples of Parthenogenesis asexual
reproduction
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These
gemmules can be formed at a time when parents feel harsh environmental conditions around them
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It is mainly found in amoeba, hydra, sponge, planaria, and many
more organisms
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ii) Restorative Regeneration – In this, severed body parts can be redeveloped or developed
into a complete
body
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With the help of asexual reproduction,
population increases rapidly
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One of the common
examples is bacteria
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In asexual reproduction, species find their
members themselves like fungi that grow from
wind-blown spores
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Asexual reproduction is often accomplished by just having a part of the parent
organism
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This reproduction is friendly to the environment
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Moreover, there are no risks
which can cause any type of problem to the
other partner
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There is no need of energy and time to
produce offspring
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6
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They do not
require any reproductive sources to produce
cells
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In asexual reproduction, the organism does
not require different places to produce its offspring
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1
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It doubles its population in each of the reproductive
cycles
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2
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3
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One parent can produce a high number of offspring in a very less
period
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4
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The inhabitant could destroy the entire species in a very
short duration of time
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It may sometimes lead to unfavorable conditions like extreme temperatures that can eliminate
the entire community
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