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In organisms such as Amoeba, the splitting of the two cells during division can take place in ________.
any plane
one fixed plane
two fixed planes
multiple equal planes
any plane
In organisms such as Amoeba, binary fission can take place in any plane. Unlike some other organisms that have a specific plane of division, Amoeba has an irregular shape and its division is not bound to a fixed axis.
In organisms such as Amoeba, binary fission can take place in any plane. Unlike some other organisms that have a specific plane of division, Amoeba has an irregular shape and its division is not bound to a fixed axis.
Think of cutting a blob of soft dough or clay in half with a knife from any directionтАФit splits into two regardless of the angle of the cut.
Amoeba = Any plane (both start with 'A').
Binary┬аFission=Parent┬аCellтЖТ2┬аDaughter┬аCells
During binary fission in Amoeba, the nucleus first divides mitotically into two, followed by the constriction of the cytoplasm. Since Amoeba lacks a fixed shape or definite symmetry (asymmetrical body plan), cytokinesis can occur in any random plane passing through the cell.
Amoeba reproduces asexually primarily through binary fission under favorable conditions.
Nuclear division (karyokinesis) is followed by cytoplasmic division (cytokinesis).
Because Amoeba is irregular in shape, cell division is not restricted to any particular axis or plane.
Under unfavorable conditions, Amoeba forms a cyst (encystation) and undergoes multiple fission.
Rapid rate of population growth in favorable conditions.
No requirement of a mating partner.
Produces genetically identical offspring (clones), reducing adaptability to sudden environmental changes.
Study of unicellular eukaryotic cell cycle and mitosis.
Understanding asexual reproduction models in protozoans.
| Feature | Amoeba | Leishmania |
|---|---|---|
Plane of Division | Any plane | Longitudinal plane |
Symmetry | Asymmetrical | Bilateral (Whip-like structure) |
Option A is correct because Amoeba has no fixed shape, allowing cytokinesis to take place in any plane.
Leishmania exhibits binary fission in a definite longitudinal plane due to its whip-like flagellum.
Plasmodium undergoes multiple fission inside a cyst during unfavorable conditions.
A is correct тАФ In organisms such as Amoeba, the splitting of the two cells during division can take place in any plane.
Remember that while Amoeba divides in any plane, organisms with distinct orientation like Leishmania divide in a longitudinal plane.
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