Question

Assertion (A): Binary fission in Euglena is called symmetrogenic division.
Reason (R): Plane of fission in Euglena is at right angles to the longitudinal axis of the body.
 

• A. Both (A) and (R) are true. (R) is correct explanation for (A)
• B. Both (A) and (R) are true. (R) is not correct explanation for (A)
• C. (A) is true, but (R) is false
• D. (A) is false, but (R) is true

Hint:

Remember: {Euglena} undergoes longitudinal binary fission, hence (R) is false.

Answer 1

The Correct Option is C

- In Euglena, binary fission is called symmetrogenic division because the two daughter cells are morphologically identical.
- However, the plane of fission is longitudinal, i.e., it runs along the length of the body — not at right angles.

Thus, (A) is true, but (R) is incorrect.