Many aquatic food chains start with tiny organisms known as phytoplankton.
Although these organisms are not plants, they are producers. What do phytoplankton
have in common with plants?
A) They have leaves, which they use to produce food and oxygen.
B) They use photosynthesis to convert solar energy to chemical energy.
C) They have flowers and form seeds, which are carried by ocean currents.
D) They have roots, which prevent them from moving from one place to another.