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