WHICH FORM OF BACTERIAL CELLS IS ROD SHAPED?

04 Jun WHICH FORM OF BACTERIAL CELLS IS ROD SHAPED?

Question

QUESTION 1

Oxygen built up in the
atmosphere approximately 2 billion years ago and

A. destroyed ozone forming
more oxygen.

B. occurred due to carbon
dioxide being split by lightning strikes.

C. could not have occurred
without the oxygen coming from outer space.

D. occurred because aerobic
organisms required the oxygen.

E. helped to form the ozone
layer that is so important to life today.

QUESTION 2

Which form of bacterial
cells is rod shaped?

A. vibrios

B. bacilli

C. rhodius

D. cocci

E. spirilla

QUESTION 3

Most bacteria are

A. chemoautotrophs.

B. symbionts.

C. heterotrophs.

D. photoautotrophs.

E. microbial predators.

QUESTION 4

Rickettsias belong to which
major group of bacteria?

A. spirochetes

B. Archaea

C. cyanobacteria

D. viruses

E. proteobacteria

QUESTION 5

What term is used to
indicate a characteristic that is shared and inherited from a common ancestor?

A. homologous trait

B. cladistic trait

C. outgroups

D. derived trait

E. analogous trait

QUESTION 6

In bacteria, the cell wall
is composed mainly of

A. peptidoglycans.

B. various polysaccharides.

C. glycoproteins.

D. lipids.

E. proteins.

QUESTION 7

Eukaryotic cells are
thought to have

A. evolved before prokaryotic
cells.

B. first appeared with tough
cell walls.

C. first appeared as parts of
multicellular organisms.

D. developed when mitochondria
grew much larger in size that they had been previously.

E. appeared about 2.1 billion
years ago.

QUESTION 8

Kelps are a form of what
group of protists?

A. dinoflagellates

B. water molds

C. slime molds

D. brown algae

E. ciliates

QUESTION 9

Atmospheric chemists think
that Earth’s first atmosphere

A. consisted of carbon in the
form of carbon monoxide.

B. was very similar to today’s
atmosphere.

C. contained no oxygen atoms.

D. consisted of carbon in the
form of carbon dioxide.

E. contained nitrogen in the
form of ammonia and nitrogen gas.

QUESTION 10

Prions are composed of

A. DNA, RNA, and protein.

B. RNA.

C. protein.

D. DNA and protein.

E. DNA.

QUESTION 11

Endospores form

A. to produce two offspring
from every one parental cell.

B. as a means of genetic
recombination.

C. when the environmental
conditions are favorable.

D. in response to adverse
conditions.

E. during binary fission.

QUESTION 12

Paleontologists have found
fossils dating back 3.6 billion years. These closely resemble

A. fungi.

B. small invertebrate animals.

C. today’s simplest plants.

D. nothing alive today.

E. blue-green algae present
today.

QUESTION 13

What is the main difference
between protists and bacteria?

A. Bacteria have DNA, protists
do not.

B. Protists cannot cause
infections, bacteria can

C. Protists are unicellular,
bacteria are multicellular.

D. Protists have a nucleus,
bacteria do not

E. Bacteria are always
gram-negative, protists are gram-positive

QUESTION 14

All but one of the
following are false regarding protists. Identify the true statement.

Most protists are
single-celled organisms; some are multicellular.

A. Protists have cell walls
composed mainly of peptidoglycans.

B. Protists are prokaryotic.

C. Protists do not have the
ability to move on their own.

D. All protists are
single-celled organisms.

QUESTION 15

Of the following, which
kingdom contains the most diversity in terms of DNA sequences?

A. Protista

B. All of these are
approximately equivalently diverse.

C. Fungi

D. Animalia

E. Plantae

QUESTION 16

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. allow the animals to move
into different environments easily.

B. make these animals more
desirable to predators.

C. be a disadvantage for these
organisms and lead to their death and fossil formation.

D. protect the animal from
osmotic pressure.

E. protect the animal from
predators.

QUESTION 17

Some bacteria can form
resting structures called ___________ that can withstand extremes in
temperature, moisture, and radiation.

A. prions

B. symbionts

C. capsids

D. viroids

E. endospores

QUESTION 18

During which geological era
did Pangea break apart?

A. Cenozoic

B. Paleozoic

C. Archean

D. Mesozoic

E. Proterozoic

QUESTION 19

When taxonomists classify
organisms using a phylogenetic approach, they are most concerned with

A. derived traits.

B. outgroups.

C. ancestral traits.

D. cladists.

E. ingroups.

QUESTION 20

The endosymbiont hypothesis
suggests that the mitochondria of eukaryotic cells are descended from captured

A. eukaryotic algae.

B. chemoautotrophic bacteria.

C. cyanobacteria.

D. aerobic bacteria.

E. archaebacteria.