Algae and Protozoa

A unicellular algae with cell walls filled with silica is called

• dinoflagellates
• red algae
• diatoms
• green algae

_________ cause poisonous red tides.

• dinoflagellates
• diatoms
• euglena
• rhodophyta

Which type of algae lives primarily in freshwater?

• Green algae
• Red algae
• Brown algae

The carbohydrates Algin and Carageenan, useful in making ice cream come from 

• Red algae
• Brown algae
• Diatoms
• Golden Algae

The agar that we used for growing bacteria comes from

• Brown algae
• Green Algae
• Red Algae
• Golden Algae

What phylum is green algae placed in? 

• phaeophyta
• rhodophyta
• chrysophyta
• chlorophyta

Which type of algae is often added to toothpaste?

• dinoflagellates
• kelp
• red algae
• diatoms

Which type of algae can grow in the deepest water depths?

• red algae
• brown algae
• golden algae
• green algae

Unicellular green algae that are motile belong to the phylum

• chlorophyta
• euglenophyta
• phaeophyta
• rhodophyta

Commonly known as pond scum

• chlorophyta
• phaeophyta
• rhodophyta
• chrysophyta