Question

Assertion (A): Chlamydomonas are photosynthetic in nature.
Reason (R): The anterior part of the cell bears two flagella which helps in locomotion.

• A. Both A and R are false.
• B. A is true but R is false.
• C. Both A and R are true and R is the correct explanation of A.
• D. Both A and R are true but R is NOT the correct explanation of A.

Answer 1

The correct option is D

Both A and R are true but R is NOT the correct explanation of A.

• Chlamydomonas contains large dark nucleus lying inside the cavity of the cup shaped chloroplast that helps in photosynthesis.
• The anterior part of the cell bears two flagella which helps in locomotion.
• Two contractile vacuoles are seen at the base of each flagellum.
• The anterior side of the chloroplast contains a tiny red coloured eyespot.