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