Which plankton are considered microplankton? a. ...

[shofmannx20]

Which plankton are considered microplankton?
  a. Silicoflagellates
  b. Dinoflagellates
  c. Coccolithophores
  d. Cyanobacteria

Question 2

Why are phytoplankton critical for marine life?
  a. They are large contribution to marine food webs
  b. They generate massive amounts of atmospheric oxygen
  c. They are able to bind billions of tons of carbon into carbohydrates
  d. All of these choices

[millet]

Answer to Question 1

ANS: B
Microplankton are those in the size range of 20 to 200 micrometers. Diatoms and dinoflagellates, the
most common phytoplankton, are in this size range. Information can be found in the section
Phytoplankton are Autotrophs

Answer to Question 2

ANS: D
Phytoplankton are important to all life on Earth, not just marine life. They are responsible for binding
at least 35 billion metric tons of carbon into carbohydrates for use by animals. This is 45 of all
photosynthetic food generated on our planet. Information can be found in the section Phytoplankton
are Autotrophs.