Which one of the following statements is wrong ?

(1) Algae increase the level of dissolved oxygen in the immediate environment.
(2) Algin is obtained from red algae, and carrageenan from brown algae.
(3) Agar-agar is obtained from Gelidium and, Gracilarta.
(4) Laminaria and Sargassum are used as food.

Anurag Mishra Professor Asked on 26th July 2016 in Biology.
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