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ASTRONOMY 2021 ASTRO EXAM 2 QUIZ BANK
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ASTRONOMY 2021 ASTRO EXAM 2 QUIZ BANK[13-03-16 12:06:57 AM] Scott Kennedy: Partie 1 de 5 - 5.1: Defining Life 3.0/ 3.0
Points
Question 1 de 11
1.0/ 1.0 Points
Different dog breeds have been bred by humans from a common ancestor over
the past few thousand years. This is an example of
A. un-natural selection
B. natural selection
C. artificial selection
D. artificial insemination
Clé de correction: C
Question 2 de 11
1.0/ 1.0 Points
Energy utilization in living organisms is
A. neither a necessary nor a sufficient condition for life
B. not important for organisms that have adapted to survive extremely low
temperatures (psychrophiles)
C. only important for organisms like plants which receive their energy directly
from the Sun
D. one of the most basic requirements of life, without which organisms could not
maintain order, grow, and reproduce
Clé de correction: D
Question 3 de 11
1.0/ 1.0 Points
The different species of finches found on the Galapagos islands are evidence of
Darwin's theory of natural selection because
A. all species are competing for the same resources
B. they are capable of interbreeding with each other
C. they have all evolved adaptations from a common ancestor to suit the
environmental conditions found on different islands
D. some species are more successful than others
,Clé de correction: C
Partie 2 de 5 - 5.2: Cells 4.0/ 4.0 Points
Question 4 de 11
1.0/ 1.0 Points
What is the MOST important role that proteins play in living organisms on Earth?
A. basic functioning of living organisms
B. short-term energy storage and cell structure
C. information storage
D. long-term energy storage and cell membranes
Clé de correction: A
Question 5 de 11
1.0/ 1.0 Points
Enzymes are examples of
A. lipids
B. carbohydrates
C. nucleic acids
D. proteins
Clé de correction: D
Question 6 de 11
1.0/ 1.0 Points
Which of the following observations is consistent with the hypothesis that all life
on Earth has a common ancestor?
A. all proteins are made of amino acids
B. different organisms use different sets of amino acids
C. different organisms use the same set of amino acids
D. some organisms don't use amino acids at all
Clé de correction: C
Question 7 de 11
1.0/ 1.0 Points
, Why might we think that silicon would be an obvious alternative to carbon as a
building block for biological molecules?
A. it has a similar abundance on Earth to carbon
B. it has a similar electronic structure to carbon, forming a maximum of four
bonds and, hence, should have a similar chemistry
C. it forms the basis of some life forms on Earth
D. it forms complex molecules like carbon
Clé de correction: B
Partie 3 de 5 - 5.4: DNA 0.0/ 1.0 Points
Question 8 de 11
0.0/ 1.0 Points
A section of DNA that corresponds to a particular protein is known as a
A. genome
B. gene
C. chromosome
D. codon
Clé de correction: B
Partie 4 de 5 - 5.3: Metabolism 2.0/ 2.0 Points
Question 9 de 11
1.0/ 1.0 Points
A chemoheterotroph gets is energy from
A. chemical reactions and its carbon from other organisms
B. the Sun and its carbon from its environment
C. the Sun and its carbon from other organisms
D. chemical reactions and its carbon from its environment
Clé de correction: A
Question 10 de 11
1.0/ 1.0 Points
A photoautotroph gets its energy from
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