types of asexual reproduction
Answers
Answer:
Binary fission
Budding in hydra
fragmentation
regeneration
vegetative propagation
spore formation
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Answer:
MARK IT AS BRAINLIEST
Reproduction
Asexual Reproduction
1. A single parent involved
2. Gametes not formed
3. Progeny is Identical to parent
e.g. Fission in Amoeba
Asexual Reproduction
A. Fission – It is a mode of asexual reproduction in which a parent undergoes division to form 2 or more individuals.
Fission is further of two types –
a) Binary Fission – “splitting into two” e.g. Amoeba, Paramecium.
Division of nucleus → cleavage of cytoplasm
b) Multiple Fission – one unicellular parent divides & splits internally to forms a no. of individuals.
Repeated Nucleus division → Multiple daughter nuclei in single cell → Cytoplasm gathers around each nuclei → Cell bursts open → Release multiple cells at the same time.
E.g. Plasmodium (Material Parasite), Amoeba in unfavorable conditions for spore formation.
B. Budding – It is a mode of reproduction in which a small outgrowth from an organism converts itself into a new organism.
The individual produces a small protrubrance/bud → Parent nucleus divides → one passes into bud → bud grows in size → constrict from base → forms a new individual
E.g. In unicellular – Yeast & In multicellular – Hydra
Budding differs from fission in following aspects :
1. The parent individual remains even after the formation of daughter organism.
2. Cytoplasm starts dividing before nucleus division.
3. Nucleus division is equal & cytoplasm division is unequal unlike Fission where both divisions are equal.
C. Spore Formation – specialized asexual reproduction that takes place during unfavorable conditions in unicellular organisms. Spore contains a nucleus with small cytoplasm & a rough protective covering (thick cell wall) which prepares the cell to survive harsh conditions for long time.
Sporangia develops from the hyphae → bears spores by asexual reproduction → sporangium bursts open to release spores in to the environment → new spores forms a new mycelium (cell wall gets dissolved)
E.g. Fungus – Rhizopus (Bread mould), Algae – Ulothrix.
Spores get dispersed through Air, Water, (Abiotic factors)
OR Insects, Birds (Biotic factors) by sticking to their bodies.
Zoo Spore – Motile i.e. movable spore.
D. Fragmentation – Organism’s body breaks down into pieces upon maturation → Pieces grows into new individuals.
E.g. In Spirogyra as depicted below :
E. Regeneration – It is a mode of Asexual reproduction in which a new organism develops from a part of the parent.
Regeneration is performed by some special reserves/stem cell in a multicellular organism. E.g. Hydra, Star Fish, Planaria.
Regeneration is not similar to reproduction because organism is depending upon being cut or broken to regenerate; which is not a feature reproduction.
F. Vegetation propagation – It is a form of asexual plant reproduction. A part of plant – root, stem or leaf grows into new plant exactly like parent plant. Seedless fruits, vegetables have to be reproduce by this method only.
Explanation: