The Origin and Diversification of Eukaryotes

Question 1

The contractile vacuole of Paramecium has what function or role?

Answer 1

water regulation

Question 2

Mixtroph indicated an organism is

Answer 2

can be both heterotrophic and autotrophic

Question 3

The protist genus responsible for malaria is

Answer 3

plasmodium

Question 4

Protists

Answer 4

• they are eukaryotes

Question 5

Secondary Endosymbiosis

Answer 5

• cells that had obtained their plastids through endosymbiosis were engulfed
• themselves became plastids in heterotrophic eukaryotic cells

Question 6

Trypanosomes are effective parasites of humans because they evade the immune system by

Answer 6

sequentially changing surface proteins

Question 7

Shared Characteristics of Eukaryotes and Prokaryotes

Answer 7

• a cell membrane
• ribosomes
• genetic material
• a cytoplasm
• plasma membranes

Question 8

Organism in which group are responsible for the phenomenon called “red tide”?

Answer 8

dinoflagellates

Question 9

Forams

Answer 9

• a hard proud test (shell)

Question 10

How do diatoms affect global atmospheric CO2 levels?

Answer 10

• diatoms absorb CO2
• pumping CO2 downwards towards the ocean floor when they die
• lowering CO2 levels

Question 11

For approximately how long was Earth populated exclusively by microscopic organisms?

Answer 11

3 billion years

Question 12

Algae

Answer 12

• they are photosynthetic

Question 13

Dinoflagellates

Answer 13

• posses two flagella
• cells of many are reinforced by cellulose plates
• two flagella are located in grooves in this (armor)
• flagella spin as they move through the water
• marine and freshwater living
• half are purely heterotrophic
• possess membrane bound organelles
• include mitochondria