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