Question

filaments are unbranched in:
A.oedogonium
B.zygnema
C.spirogyra
D.all of these

Answer 1

Filaments are unbranched in Spirogyra.

Spirogyra is one species of the many kinds of species(more than 400)  of floating green algae.

This species of algae is free floating and has spiral shaped chloroplasts.

Spirogyra has filaments which are unbranched and these are present in cylindrical forms.

These filaments are vacuoles of huge sizes.