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