Question

The Ulothrix is considered morphologically more advanced than Spirogyra because

• A. In Ulothrix zoospores are formed.
• B. In Ulothrix motile gametes are formed.
• C. In Ulothrix, the filament has holdfast.
• D. None of the above.

Answer 1

The correct option is B In Ulothrix motile gametes are formed.

In Ulothrix motile gametes are formed therefore it is considered more advance than spirogyra. Even when gametes are not conjugating, their more rapid movement is noticeable; and when conjugating, the awkward, jerky movements of the pair contrasts sharply with the graceful movements of the zoospores.