Which one is wrongly matched?(a) Gemma cups - Marchantia(b) Biflagella

1.	Which one is wrongly matched?(a) Gemma cups - Marchantia(b) Biflagellate zoospores - Brown algae(c) Uniflagellate gametes - Polysiphonia(d) Unicellular organism - Chlorella
Answer» The correct option is(c) Uniflagellate gametes - Polysiphonia Explanation: Polysiphonia is a red algae. In it sexual reproduction is of oogamous type. The male sex organ, spermatangium produces non-flagellate male gametes. In Brown algae, sexual 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.

Which one is wrongly matched?(a) Gemma cups - Marchantia(b) Biflagellate zoospores - Brown algae(c) Uniflagellate gametes - Polysiphonia(d) Unicellular organism - Chlorella

Answer»

The correct option is(c) Uniflagellate gametes - Polysiphonia

Explanation:

Polysiphonia is a red algae. In it sexual reproduction is of oogamous type. The male sex organ, spermatangium produces non-flagellate male gametes.

In Brown algae, sexual 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.

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