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