Question

The functional part of the pollen tube is separate from the rest by

• A. Vacuoles
• B. Callose plugs
• C. Septa
• D. Both B and C

Answer 1

The correct option is B Callose plugs

Callose is a beta-1,3-glucan. It is the major component of the pollen tube cell wall. It is also deposited within the cytoplasm as distinct callose grains. This leads to the formation of callose plugs. Callose plugs separate the living, growing and functional part of the pollen tube in the tip from the remaining degenerating part.

Thus, the correct answer is option B.