Compare and contrast two of the three phytoplankton discussed at length in this chapter (Diatoms,
Dinoflagellates, and Coccolithophores). What will be an ideal response?
ANS:Answer
should include:
? Diatoms are one of the most abundant and productive phytoplankton in the ocean. They
have a glass-like frustule body structure which is made up of closely fit valves. They
contain yellow and brown accessory pigments.
? Dinoflagellates are single-celled autotrophs with normally two whip-like flagella. There
are some species that live within tissues of other organisms. These phytoplankton are the
main cause for red tides and harmful algae blooms. Some can transform chemical energy
they use into light energy. This is called bioluminescence.
? Coccolithophores are autotrophs that have calcium carbonate disks covering their body.
They thrive at the surface in brightly lighted areas. These are responsible for seabed
oozes which can uplift like the White Cliffs of Dover
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D) Continental collision
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