prokaryotes
zooplankton
eukaryotes
phytoplankton
the ocean
algae
drifting or wandering
aquatic (water-living)
microscopic
plants
it makes the water more acidic.
it makes the water saltier.
it kills large predators like sharks.
All plankton are microscopic (too small to see without a microscope).
A few dozen cells
Millions of cells
Hundreds of cells
Thousands of cells
Zooplankton are tiny animals.
Just for fun
To scare away predators
To see in the dark
To attract a mate