Question:
The transverse binary fission of Paramecium is also called homothetogenic fission because:
The transverse binary fission of Paramecium is also called homothetogenic fission because:
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Paramecium divides transversely, unlike Euglena which divides longitudinally.
Updated On: Jun 20, 2026
- The plane of fission is at right angles to the longitudinal axis of the body
- The plane of fission is parallel to the longitudinal axis of the body
- The plane of fission is at right angles to the transverse axis of the body
- The plane of fission is parallel to the transverse axis of the body
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The Correct Option is A
Solution and Explanation
Step 1: Understanding Paramecium structure.
Paramecium is a ciliate protozoan with an elongated body showing clear anterior-posterior polarity.
Step 2: Meaning of binary fission.
Binary fission is asexual reproduction where one cell divides into two identical daughter cells.
Step 3: Understanding homothetogenic fission.
In Paramecium, division occurs in such a way that daughter cells are mirror images of each other.
Step 4: Plane of division.
The division occurs transversely, meaning perpendicular to the long axis (longitudinal axis) of the body.
Step 5: Biological reasoning.
Because the plane of fission is perpendicular to the longitudinal axis, equal distribution of organelles occurs symmetrically.
Step 6: Final conclusion.
Thus, the correct reason is that the plane of fission is at right angles to the longitudinal axis.
Paramecium is a ciliate protozoan with an elongated body showing clear anterior-posterior polarity.
Step 2: Meaning of binary fission.
Binary fission is asexual reproduction where one cell divides into two identical daughter cells.
Step 3: Understanding homothetogenic fission.
In Paramecium, division occurs in such a way that daughter cells are mirror images of each other.
Step 4: Plane of division.
The division occurs transversely, meaning perpendicular to the long axis (longitudinal axis) of the body.
Step 5: Biological reasoning.
Because the plane of fission is perpendicular to the longitudinal axis, equal distribution of organelles occurs symmetrically.
Step 6: Final conclusion.
Thus, the correct reason is that the plane of fission is at right angles to the longitudinal axis.
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