1. Tardigrade
  2. Question
  3. Biology
  4. Consider the following statements. I. Agar, one of the commercial products obtained from Gelidium and Gracilaria is used to grow microbes and in preparations of ice-creams and jellies. II. Chlorella and Chlamydomonas are used in sewage disposal ponds. III. Some species of marine algae like Porphyra, Laminaria and Sargassum are used as food. IV. Volvox forms spherical colonies made of non-motile cells. Which of the statements given above are correct?

Q. Consider the following statements.
I. Agar, one of the commercial products obtained from Gelidium and Gracilaria is used to grow microbes and in preparations of ice-creams and jellies.
II. Chlorella and Chlamydomonas are used in sewage disposal ponds.
III. Some species of marine algae like Porphyra, Laminaria and Sargassum are used as food.
IV. Volvox forms spherical colonies made of non-motile cells.
Which of the statements given above are correct?

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Solution:

Statements I, II and III are correct. Statement IV is incorrect and can be corrected as
Volvox is a colonial green alga with motile cells.