1. KEY CONCEPT Algae are plantlike protists.

2. Plantlike protists can be single-celled or multicellular.
Photosynthetic plantlike protists are called algae.
colony
daughter colony

3. Euglenoids are a large group of plantlike protists.
mostly photosynthetic
some heterotrophic
single-celled
one or two flagella
pellicle
nucleus
chloroplast
eye spot
contractile
vacuole
flagellum

4. Dinoflagellates are mostly marine plantlike protists.
have two flagella
may be bioluminescent
have stiff protective plates
can cause red tide
Dinoflagellates

5. Diatoms are plantlike protists with glasslike shells.
shells made of silica
produce large amounts of oxygen

6. Multicellular algae are classified by their pigments.
Green algae.
Brown algae
Red algae

7. Many plantlike protists can reproduce both sexually and asexually.
All algae can reproduce asexually.

8. Some algae produce sexually.