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Postby dionne2004 » Thu Mar 23, 2006 6:02 pm

MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.


1)

You culture the dried soup from a 4,000-year-old cooking pot found in an Egyptian tomb and obtain a distinctive species of prokaryote. You immerse a test tube of these bacteria in boiling water for several hours, but the colony grows back. This species is probably

A)

endospore-forming.
B)

a spirochete.
C)

acidophilic.
D)

halophilic.
E)

a cyanobacteria.


2)

Which one of the following statements about prokaryotes is false?

A)

Boiling water does not kill many endospores.
B)

The genome of most prokaryotes is about the same size as the genome of most eukaryotic cells.
C)

Some prokaryotes have thylakoid membranes that function in photosynthesis.
D)

Some aerobic prokaryotes have infoldings of their plasma membrane that function in cellular respiration.
E)

Prokaryotes have the potential to reproduce quickly.


3)

Which one of the following statements about the evolution of multicellularity is false?

A)

Compared to unicellular life, a multicellular organism has cells that perform specialized functions and are dependent upon each other.
B)

The organisms linking multicellular organisms to their unicellular ancestors were probably unicellular protists that lived as colonies.
C)

Today's multicellular organisms descended from several different kinds of unicellular protists.
D)

Current evidence suggests that animals and plants evolved from a common protist.
E)

The oldest known fossils of multicellular eukaryotes are small multicellular algae.


4)

Which of the following organisms first gave Earth its oxygen-containing atmosphere?

A)

plants
B)

green algae
C)

cyanobacteria
D)

methanogens
E)

early protozoans


5)

Evidence for the closer relationship of archaea to eukaryotes than archaea to bacteria includes all of the following except

A)

similar rRNA sequences.
B)

the presence of peptidoglycan in the cell wall.
C)

similar RNA polymerase.
D)

lack of sensitivity to some antibiotics.
E)

the presence of introns.


6)

Which of the following statements about euglenozoans is true?

A)

Euglenozoans include heterotrophs, photosynthetic autotrophs, and pathogenic parasites.
B)

Giardia, a parasite that lives in the intestine of mammals, is a euglenozoan.
C)

Trypanosomes and the common Euglena are euglenozoans.
D)

All of the choices are true.
E)

None of the choices are true.




7)

According to the endosymbiotic theory of the origin of chloroplasts, photosynthetic prokaryotic cells

A)

supplied the host cell with ATP from aerobic respiration in return for nutrients.
B)

lost their ability to photosynthesize.
C)

were incorporated by larger cells.
D)

donated their chloroplasts to other cells.
E)

None of the choices are correct.


8)

In the experiments of Miller, and those of other scientists, it was shown that

A)

given the conditions of early Earth, life would still require additional materials from meteorites and asteroids.
B)

amino acids and sugars could be produced from the inorganic components thought to have been on the primitive Earth.
C)

simple cells could be produced in the laboratory using a "soup" of small organic molecules.
D)

living cells could survive in the primitive Earth's atmosphere.
E)

microspheres could be formed from amino acids.


9)

Which of the following structures, if any, does not help prokaryotes stick to their substrate or each other?

A)

a capsule
B)

pili
C)

flagella
D)

sex pili
E)

All of the choices help prokaryotes stick to their substrate or each other.

10)

When the Earth first formed, it had an abundant atmosphere of hot hydrogen gas H2. What happened to this atmosphere?

A)

Most of it is still present as a component of the modern atmosphere.
B)

When the Earth melted, it burned.
C)

It escaped into space because the Earth's gravitational field was not strong enough to hold it.
D)

Most of it combined with the oxygen in the early atmosphere to form water, which rained down and became the oceans.
E)

It was mostly absorbed by molten rock during the Earth's molten period.


11)

Cyanobacteria

A)

evolved from archaea but are now distinguished by a unique capsule containing glycoproteins.
B)

are the only prokaryotes with plant-like oxygen-generating photosynthesis.
C)

are of the same nutritional type as the earliest forms of life.
D)

are chemoautotrophs that obtain their energy from decoupling inorganic molecules.
E)

are photosynthetic archaea that derive their carbon from organic molecules containing sulfur.


12)

Which of the following group descriptions is/are not correct?

A)

Diatoms are photosynthetic, unicellular algae with a glassy cell wall made of silica.
B)

Water molds are fungus-like protists that are typically decomposers.
C)

None of the descriptions are accurate.
D)

Brown algae are seaweeds that have true stems, leaves, and roots.
E)

All of the descriptions are accurate.
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Postby bookworm29 » Thu Mar 23, 2006 6:48 pm

I dont think we are supposed to give you answers on this forum but ill help out what i think i know. I am highschool AP bio student, so i might not be right about all my answers.

1. D because halophilic describes extremeophilies that can thrive in harsh conditions. and i didnt know what spirochete was so i looked it up and well i dont think thats the answer and i am pretty sure that its not any of the others.

2. I think its A, i did a little research for this one two and found out that endospores are resistant to desiccation, temperature, starvation, ultraviolet and gamma radiation, and chemical disinfectants, because the primary job of the endospore is to ensure the survival of the colony.

3.
A, B and C are true (well i kind of came to a conclusion that if B is true than C has to be true and VV, i would say that E

ok i am tired now, but ill come back to your questions, they help me review my material too. thanks.
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Postby canalon » Thu Mar 23, 2006 8:12 pm

bookworm29 wrote:I dont think we are supposed to give you answers on this forum but ill help out what i think i know. I am highschool AP bio student, so i might not be right about all my answers.


Right we may help, but basically the policy is: Do your homework. And if you come her prove you have a least made some researche, i.e. tell us what you think and why (not just randomly highlighting one answer...)

bookworm29 wrote:1. D because halophilic describes extremeophilies that can thrive in harsh conditions. and i didnt know what spirochete was so i looked it up and well i dont think thats the answer and i am pretty sure that its not any of the others.


Too bad wrong answer. Halophilic means "who likes salt" But the idea is good, look up the definitions, and that will be easy.

bookworm29 wrote:2. I think its A, i did a little research for this one two and found out that endospores are resistant to desiccation, temperature, starvation, ultraviolet and gamma radiation, and chemical disinfectants, because the primary job of the endospore is to ensure the survival of the colony.

Which makes A true. just read the question... So A is NOT the right one.

As for 3, I am not sure, but the link between B and C by bookworm doesnot seem evident to me...

So read your text book, probably most of the answers will be there. So come back when you'll have a little more research
Patrick

Science has proof without any certainty. Creationists have certainty without
any proof. (Ashley Montague)
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Postby mith » Thu Mar 23, 2006 9:51 pm

Exactly, I don't think your teacher would appreciate what you're doing with your test.
Living one day at a time;
Enjoying one moment at a time;
Accepting hardships as the pathway to peace;
~Niebuhr
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