Life: The Science of Biology

Purves, William K., Sadava, David E., Orians, Gordon H., Heller, H. Craig

Chapter 28

Protists and the Dawn of the Eukarya - all with Video Answers

Educators

Chapter Questions

Problem 1

Protists with flagella
$a$. appear in several protist clades.
$b$. are all algae.
$c .$ all have pseudopods.
$d$. are all colonial.
$e .$ are never pathogenic.

Noah Boudrie

Noah Boudrie

Numerade Educator

Problem 2

Which statement about amoebas is not true?
a. They are specialized.
$b$. They use amoeboid movement.
$c .$ They include both naked and shelled forms.
$d$. They possess pseudopods.
$e .$ They appeared only once in evolutionary history.

Noah Boudrie

Numerade Educator

Problem 3

Apicomplexans
a. possess flagella.
b. possess chloroplasts.
$c .$ are all parasitic.
$d$. are algae.
$e .$ include the trypanosomes that cause sleeping sickness.

Noah Boudrie

Numerade Educator

Problem 4

The ciliates
a. move by means of flagella.
b. use amoeboid movement.
$c .$ include Plasmodium, the agent of malaria.
$d$. possess both a macronucleus and micronuclei
$e .$ are autotrophic.

Noah Boudrie

Numerade Educator

Problem 5

The acellular slime molds
a. include the genus Physarum.
$b$. lack fruiting bodies.
$c .$ consist of large numbers of myxamoebas.
$d .$ consist at times of a mass called a pseudoplasmodium.
e. possess flagella.

Noah Boudrie

Numerade Educator

Problem 6

The cellular slime molds
a. possess apical complexes.
$b$. lack fruiting bodies.
$c .$ form a plasmodium that is a coenocyte.
d. use cAMP as a "messenger" to signal aggregation.
$e .$ possess flagella.

Noah Boudrie

Numerade Educator

Problem 7

The chloroplasts of photosynthetic protists
a. are structurally identical.
b. gave rise to mitochondria.
$c .$ are all descended from a once free-living cyanobacterium.
$d$. all have exactly two surrounding membranes.
$e .$ are all descended from a once free-living red alga.

Zachary Papazian

Zachary Papazian

Numerade Educator

Problem 8

Which statement about the brown algae is not true?
$a$. They are all multicellular
$b$. They use the same photosynthetic pigments as do plants.
$c .$ They are almost exclusively marine.
$d$. A few are among the largest organisms on Earth.
$e$. Some have extensive tissue differentiation.

Noah Boudrie

Numerade Educator

Problem 9

The red algae
$a$. are mostly unicellular.
$b$. are mostly marine.
$c$. owe their red color to a special form of chlorophyll.
$d .$ have flagella on their gametes.
$e .$ are all heterotrophic.

Heather Thornton

Heather Thornton

Numerade Educator

Problem 10

Which statement about the chlorophytes is not true?
$a$. They use the same photosynthetic pigments as do plants.
$b$. Some are unicellular.
$c$. Some are multicellular.
$d$. All are microscopic in size.
$e .$ They display a great diversity of life cycles.

Noah Boudrie

Numerade Educator