Which of the following is not true of seaweeds?
a. They are found in the red, green, and brown algal groups
b. they have true roots that anchor them tightly to withstand the turbulence of waves.
c. they are a source of food and commercial products.
d. the gel-forming polysaccharides in their cell walls protect them from the abrasive action of waves.
e. they are multicellular photoautotrophs
Answer: b