Question 1
according to fossil evidence, the evolution of eukaryotic cells occurred about years ago.

3.2 to 6.1 million

250 to 500 million

1.2 to 1.5 billion

3.5 to 3.8 billion

1 points
question 2
the protists include

heterotrophs.

autotrophs.

both a and b

none of the above

1 points
question 3
which of the following statements describes ciliates?

they have no cell walls.

they are unicellular.

they are heterotrophic.

all of the above

1 points
question 4
what do ciliates use small cilia for?

energy

locomotion

reproduction

all of the above

1 points
question 5
euglenoid chloroplasts are surrounded by membranes.

no

four

two

three

1 points
question 6
some autotrophic euglena species become when light levels are low.

inactive

heterotrophic

saprophytic

none of the above

1 points
question 7
red tides release into the ocean.

nutrients

carbon dioxide

oxygen

toxins

1 points
question 8
phylum amoebozoa traditionally included

amoebas.

radiolarians.

foraminiferans.

all of the above

1 points
question 9
are the most numerous unicellular algae in the oceans.

amoebas

golden algae

diatoms

none of the above

1 points
question 10
which of the following have numerous hair-like projections from their flagella?

diatoms

golden algae

water molds

all of the above