Question

Ten cells each in the two adjacent filaments of Spirogyra affinis are participating in reproduction. How many new Spirogyra plants are produced through sexual reproduction?

• A. $5$
• B. $10$
• C. $20$
• D. $40$

Answer 1

The correct option is B $10$

• In Spirogyra affinis, sexual reproduction occurs through conjugation in which adjacent cell of the same filament conjugate, the protoplasm of one cell (male gametes) migrate to the other cell(female gamete) fuses to form zygospore which on germination forms a single filament.
• Hence, Ten cells each in the two adjacent filaments of Spirogyra affinis are participating in reproduction. 10 new Spirogyra plants are produced through sexual reproduction
• So, the correct answer is '10'.