Nutrients in surface waters can become depleted following periods ...

[Arii_bell]

Nutrients in surface waters can become depleted following periods of rapid phytoplankton growth known as ------------Fill in the blank(s) with the appropriate word(s).

Question 2

Small, single-celled autotrophs covered with disks of calcium carbonate fixed to the outside of their cell walls are
  ____________. Fill in the blank(s) with the appropriate word(s).

[frankwu0507]

Answer to Question 1

plankton blooms
phytoplankton blooms

Answer to Question 2

coccolithophores

[Arii_bell]

TYSM

[tuate]

Thanks for the timely response, appreciate it