Krogh Biology a Guide to the Natural World 5th Txtbk

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C e C st a BIO 112: Introduction to Biology (4122_90Z3) Final Examination 7/25/12 12:34 PM 7/25/12 1:23 PM Completed 99.90003 out of 99.89999 points 48 minutes.

All questions on this exam are multiple choice. Choose the best answer for each question. 3.33 out of 3.33 points

Question 1

Plants such as soybeans house bacteria in their roots that receive food from them, while the bacteria provide the soybeans with a usable form of nitrogen. This is an example of: Selected Answer: Correct Answer: b.

mutualism
b.

mutualism
Response Feedback: Yes!!

Question 2

3.33 out of 3.33 points

The first law of thermodynamics, commonly accepted by all major areas of the scientific community, states that . . . Selected Answer: Correct Answer: b.

Energy is never created or destroyed but is only transformed. b.

Energy is never created or destroyed but is only transformed. Response Feedback: You are correct!

Question 3
An agent of change in allele frequencies includes:
Selected Answer: Correct Answer: a.

3.33 out of 3.33 points

all of these
a.

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Review Test Submission: Final Examination

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all of these
Response Feedback: Good job!

Question 4

3.33 out of 3.33 points

A(n) __________ consists of all members of a single species that live in a defined geographic region, while a(n) __________ consists of the populations of all species that live in a defined region. Selected Answer: Correct Answer: b.

population; community
b.

population; community
Response Feedback: Good job!

Question 5

3.33 out of 3.33 points

__________ can be defined as the random distribution of homologous chromosome pairs during meiosis. Selected Answer: Correct Answer: d.

independent assortment
d.

independent assortment
Response Feedback: Awesome!

Question 6

3.33 out of 3.33 points

When new members are added to a population, such as with migration, it is known as: Selected Answer: Correct Answer: d.

gene flow
d.

gene flow
Response Feedback: Nice work.

Question 7
Unrepaired mutations can result in which of the following?
Selected Answer: Correct Answer: c.

3.33 out of 3.33 points

all of these
c.

all of these

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Review Test Submission: Final Examination

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Response Feedback:

That's correct! Of the 3.2 billion bases that have to be copied each time a human cell divides, it's most surprising that so few mistakes happen and even fewer go unrepaired.

Question 8

3.33 out of 3.33 points

Watson, Crick, Franklin and Wilkins are credited for discovering the double helix structure of DNA through what method? Selected Answer: a.

x-ray diffraction
Correct Answer: a.

x-ray diffraction
Response Feedback:

That's right! X-ray diffraction was a new technology at the time.

Question 9
What is one effect of oxidation?
Selected Answer: Correct Answer: d.

3.33 out of 3.33 points

rust
d.

rust
Response Feedback: Correct!

Question 10

3.33 out of 3.33 points

The primary difference between a prokaryotic and a eukaryotic cell is . . . Selected Answer: Correct Answer: a.

A eukaryotic cell contains DNA enclosed within a nucleus, whereas a prokaryotic cell contains DNA which is not enclosed inside a nucleus. a.

A eukaryotic cell contains DNA enclosed within a nucleus, whereas a prokaryotic cell contains DNA which is not enclosed inside a nucleus.

Response Feedback: Great job! That's a tough one!

Question 11

3.33 out of 3.33 points

A rock perched precariously at the top of a hill is an example of what kind of energy? Selected Answer: b.

potential energy

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