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In organisms such as Amoeba, the splitting of the two cells during binary fission can take place in ________.
Any plane
Only longitudinal plane
Only transverse plane
Only diagonal plane
Any plane
In Amoeba, binary fission occurs in any plane because the organism lacks a specialized body shape or fixed anatomical axes. The nucleus undergoes mitosis (karyokinesis) followed by the division of the cytoplasm (cytokinesis) to form two identical daughter cells.
In Amoeba, binary fission occurs in any plane because the organism lacks a specialized body shape or fixed anatomical axes. The nucleus undergoes mitosis (karyokinesis) followed by the division of the cytoplasm (cytokinesis) to form two identical daughter cells.
Think of a ball of playdough that can be cut into two equal halves from any angle because it doesn't have a specific 'head' or 'tail' to align the cut.
Amoeba = Any plane (A for A)
NtтАЛ=N0тАЛ├Ч2n тАФ where NtтАЛ is the final population, N0тАЛ is initial population, and n is the number of generations.
The process begins with the replication of the genetic material, followed by the elongation of the nucleus. The nucleus divides via mitosis, and the contractile vacuole stops functioning briefly. Finally, the cytoplasm undergoes constriction or 'pinching' at any point, resulting in two independent amoebae.
Binary fission is a form of asexual reproduction.
Amoeba is an irregular-shaped protozoan.
Cytokinesis in Amoeba is not restricted to any specific geometrical plane.
The daughter cells are genetically identical clones of the parent.
Rapid multiplication in favorable conditions.
Does not require a partner or mate.
Lack of genetic variation leads to susceptibility to uniform environmental changes.
Rapid population growth in aquatic environments.
Biological model for studying mitosis in simple organisms.
| Feature | Amoeba | Euglena/Paramecium |
|---|---|---|
Plane of Division | Any plane | Specific planes (longitudinal/transverse) |
Amoeba proteus is the most common species studied.
Option B is incorrect because longitudinal fission occurs in Euglena.
Option C is incorrect because transverse fission occurs in Paramecium.
A is correct тАФ Amoeba lacks a fixed symmetry, allowing its cell body to split along any arbitrary plane during the process of binary fission.
Always link the body shape of a protist to its plane of fission; asymmetrical organisms like Amoeba reproduce in any plane, while symmetrical ones have fixed planes.