The correct option is(c) Uniflagellate gametes - Polysiphonia
Explanation:
Polysiphonia is a red algae. In it ** reproduction is of oogamous type. The male *** organ, spermatangium produces non-flagellate male gametes.
In Brown algae, ** reproduction varies from isogamy, anisogamy to oogamy. In isogamy and anisogamy both the gametes are motile while in oogamy only male gametes are motile. These motile gametes have two unequal laterally attached flagella.
Chlorella is a unicellular organism. It is green algae belonging to class Chlorophyta. In Marchantia, gemma cups are found on its dorsal surface. It contains gammae which help in vegetative propagation.
