Multiple choice

The diatoms are one of the largest and ecologically most significant groups of organisms on Earth. The diatom responsible for producing about a quarter of all the oxygen within Earth's biosphere is

  1. Navicula

  2. Phaeodactylum tricornutum

  3. Odontella aurita

  4. Ditylum brightwelli

  5. Bacteriastrum
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A Correct answer
Explanation

Navicula is a genus of boat-shaped diatom. Navicula play an important role in global ecology, producing about a quarter of all the oxygen within Earth's biosphere and serving as keystone species in the food chain of many environments where they provide a staple for the diets of many aquatic species.

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