Chapter 5 Multiple Choice Questions

. Which wavelengths of light are preferentially used in algal photosynthesis?

400 to 500 nm

600 to 800 nm

400 to 700

300 to 400 nm

. Why did red algae never evolve into complex organisms?

Lack of green pigments

Lack of multicellular forms

Lack of motility

Lack of cytoskeletal genes

. What are the Viridiplantae?

Green algae only

Plants

Red algae

Green algae plus land plants

. When did the Streptophyte algae first appear?

Between 1.2 and 1.0 Ga

Between 2.2 and 2.0 Ga

Before 2.5 Ga

After 0.8 Ga

. What is a complex algal endosymbiosis?

Ingestion and retention of a whole cyanobacterial cell

Ingestion and digestion of a whole algal cell

Ingestion and retention of a whole algal cell

Ingestion of a heterotrophic cell by an alga

. Is it fatal for an alga to lose the capacity for photosynthesis?

Yes, the alga will starve

Yes, the alga will stop growing

Yes, the alga will be eaten

No, in many cases algae have evolved into non-photosynthetic species

. Which former alga causes malaria?

Euglena malarialis

None, malaria is caused by mosquitoes

None, malaria is caused by bacteria

Plasmodium facilparum

. What is a diatom?

Alveolate algae

Green algae

Red algae

Stramenopile algae

. About when did algae overtake cyanobacteria as global oxygen producers?

About 2.2 to 2.0 Ga

About 1.2 to 1.0 Ga

About 0.9 to 0.7 Ga

Never, cyanobacteria are still the main global oxygen producers

. What is a glaucophyte?

A secondary alga

A type of green alga

An extinct group of algae

One of the three groups of primary algae

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