Question 1
What is the main difference between protists and bacteria?
A.
Bacteria have DNA, protists do not.
B.
Protists have a nucleus, bacteria do not
C.
Bacteria are always gram-negative, protists are gram-positive
D.
Protists are unicellular, bacteria are multicellular.
E.
Protists cannot cause infections, bacteria can
Question 2
Of the following, which kingdom contains the most diversity in terms of DNA sequences?
A.
Protista
B.
Plantae
C.
All of these are approximately equivalently diverse.
D.
Fungi
E.
Animalia
Question 3
During which geological era did Pangea break apart?
A.
Mesozoic
B.
Archean
C.
Proterozoic
D.
Cenozoic
E.
Paleozoic
Question 4
In bacteria, the cell wall is composed mainly of
A.
various polysaccharides.
B.
proteins.
C.
peptidoglycans.
D.
glycoproteins.
E.
lipids.
Question 5
Oxygen built up in the atmosphere approximately 2 billion years ago and
A.
could not have occurred without the oxygen coming from outer space.
B.
occurred because aerobic organisms required the oxygen.
C.
occurred due to carbon dioxide being split by lightning strikes.
D.
helped to form the ozone layer that is so important to life today.
E.
destroyed ozone forming more oxygen.
Question 6
Prions are composed of
A.
RNA.
B.
DNA, RNA, and protein.
C.
DNA and protein.
D.
protein.
E.
DNA.
Question 7
The endosymbiont hypothesis suggests that the mitochondria of eukaryotic cells are descended from captured
A.
eukaryotic algae.
B.
chemoautotrophic bacteria.
C.
aerobic bacteria.
D.
archaebacteria.
E.
cyanobacteria.
Question 8
All but one of the following are false regarding protists. Identify the true statement.
A.
Protists are prokaryotic.
B.
Most protists are single-celled organisms; some are multicellular.
C.
All protists are single-celled organisms.
D.
Protists do not have the ability to move on their own.
E.
Protists have cell walls composed mainly of peptidoglycans.
Question 9
Which form of bacterial cells is rod shaped?
A.
vibrios
B.
spirilla
C.
bacilli
D.
cocci
E.
rhodius
Question 10
Paleontologists have found fossils dating back 3.6 billion years. These closely resemble
A.
fungi.
B.
today?s simplest plants.
C.
small invertebrate animals.
D.
blue-green algae present today.
E.
nothing alive today.
Question 11
Eukaryotic cells are thought to have
A.
appeared about 2.1 billion years ago.
B.
developed when mitochondria grew much larger in size that they had been previously.
C.
evolved before prokaryotic cells.
D.
first appeared as parts of multicellular organisms.
E.
first appeared with tough cell walls.
Question 12
What term is used to indicate a characteristic that is shared and inherited from a common ancestor?
A.
cladistic trait
B.
homologous trait
C.
outgroups
D.
analogous trait
E.
derived trait
Question 13
Kelps are a form of what group of protists?
A.
slime molds
B.
brown algae
C.
dinoflagellates
D.
ciliates
E.
water molds
Question 14
Endospores form
A.
to produce two offspring from every one parental cell.
B.
as a means of genetic recombination.
C.
in response to adverse conditions.
D.
during binary fission.
E.
when the environmental conditions are favorable.
Question 15
The Cambrian Explosion provided a wealth of fossil remains for scientists to uncover. Many of the animals from this time period had tough skins or shells. This would
A.
protect the animal from osmotic pressure.
B.
protect the animal from predators.
C.
make these animals more desirable to predators.
D.
allow the animals to move into different environments easily.
E.
be a disadvantage for these organisms and lead to their death and fossil formation.
Question 16
Some bacteria can form resting structures called ___________ that can withstand extremes in temperature, moisture, and radiation.
A.
symbionts
B.
viroids
C.
endospores
D.
capsids
E.
prions
Question 17
Rickettsias belong to which major group of bacteria?
A.
viruses
B.
cyanobacteria
C.
spirochetes
D.
proteobacteria
E.
Archaea
Question 18
When taxonomists classify organisms using a phylogenetic approach, they are most concerned with
A.
outgroups.
B.
ancestral traits.
C.
cladists.
D.
ingroups.
E.
derived traits.
Question 19
Atmospheric chemists think that Earth?s first atmosphere
A.
consisted of carbon in the form of carbon monoxide.
B.
contained nitrogen in the form of ammonia and nitrogen gas.
C.
was very similar to today?s atmosphere.
D.
contained no oxygen atoms.
E.
consisted of carbon in the form of carbon dioxide.
Question 20
Most bacteria are
A.
photoautotrophs.
B.
heterotrophs.
C.
symbionts.
D.
microbial predators.
E.
chemoautotrophs.
Question 21
This characteristic allows fungi to withstand heat and drought conditions.
A.
mycelia
B.
spores
C.
cell walls
D.
specialized organelles
E.
hyphae
Question 22
Lichens are
A.
insensitive to changes in the environment.
B.
capable of causing some obscure diseases.
C.
parasitic interactions between a fungus and an alga.
D.
only found growing on living matter.
E.
symbiotic associations between a fungus and an alga.
Question 23
Green algae such as Ulva demonstrate an alteration of generations. The diploid phase is called the
A.
gametophyte generation.
B.
diploid generation.
