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10. Are seaweed and marine plants phytoplankton? Why?

No

Explanation:

The difference between these seaweeds and submerged plants is in their structure.

Phytoplankton are bacteria, some are protists, and most are single-celled plants. Among the common kinds are cyanobacteria, silica-encased diatoms, dinoflagellates, green algae, and chalk-coated coccolithophores.

answer; i believe that the correct answer is (lung);