Bio 110 Exam 1 Review Question with Verified
Correct Answers
Which of the following statements about natural selection is most accurate?
a) Mammals in cold climates need warm fur so they evolve thick coats.
b) Natural selection results in organisms that are perfectly adapted to their
environment.
c) Natural selection can only act on populations with genetic variation.
d) Natural selection is a random process.
c) Natural selection can only act on populations with genetic variation.
In the case study for Tutorial #1, you learned about the "Evolution Canyons" that exist
in the mountains of Israel. Singaravelan et al (2010) investigated how the melanin
content of the hair of spiny mice (Acomys cahirinus) has evolved in response to
alternative selection pressures inflicted by contrasting colored habitats of Evolution
Canyon I (ECI). The results of this study show that spiny mice that live on the African
slope of ECI have
a) higher pheomelanin than eumelanin content in their hair.
b) lower pheomelanin than eumelanin content in their hair.
c) coloration that is the same as spiny mice living on the European slope.
d) darker hair than their counterparts on the European slope.
a) higher pheomelanin than eumelanin content in their hair
Natural selection _______________________.
a) is the process by which a population becomes more well adapted to its' environment
over time
b) is the same as evolution
,c) only took place a long time ago
d) is the only evolutionary process
a) is the process by which a population becomes more well adapted to its' environment over
time
The available scientific data indicates that life first arose ______________.
a) 500 million years ago
b) about 3.7 billion years ago
c) less than 10,000 years ago
d) about 3.7 million years ago
b) about 3.7 billion years ago
Amino acids are joined by _________.
a) peptide bonds
b) hydrogen bonds
c) ionic bonds
d) van der Waals interactions
a) peptide bonds
An example of catabolism is the _________________.
a) removal of water from a peptide bond
b) breakdown of starch into simple sugars
c) production of testosterone
d) synthesis of DNA from nucleotide bases
b) breakdown of starch into simple sugars
,If two molecules of glucose (C6H12O6) are joined via condensation synthesis, the
resulting molecule would have a molecular formula of _______________.
a) C12H25O13
b) C12H24O12
c) C12H22O11
d) C6H12O6
c) C12H22O11
Sweat plays an important role in thermoregulation due to the high heat of vaporization
of water. That is, it takes energy to not only raise the temperature of water, but
additional energy is required to make the phase change from water to gas. In
individuals with HED (hypohidrotic ectodermal dysplasia), sweat gland numbers are
reduced. Predictably, what symptoms occur in HED-affected individuals?
a) They would have excessive body odor.
b) They would always be thirsty.
c) They would be prone to heat stroke.
d) There would be no symptoms associated with this condition.
c) They would be prone to heat stroke.
Lipids are predominantly hydrophobic because of their ______________.
a) sugar-phosphate backbone
b) nitrogenous bases
c) phosphate groups
d) hydrocarbon chains
d) hydrocarbon chains
, RNA's nitrogenous bases include ____________.
a) guanine and thymine
b) uracil and thymine
c) uracil and guanine
d) none of these choices
c) uracil and guanine
Ice floats. What would be the consequence to aquatic life if ice sank?
a) There would be no consequence.
b) Aquatic life would suffer in the winter.
c) Aquatic life would suffer in the summer.
d) Aquatic life would benefit in the winter.
b) Aquatic life would suffer in the winter.
There are _________ amino acids that are used by organisms for protein synthesis.
a) 10
b) 20
c) 30
d) 5
b) 20
All of the following are functions of proteins EXCEPT _____________.
a) storage of genetic information
b) skin coloration
c) digestion
d) oxygen transport
Correct Answers
Which of the following statements about natural selection is most accurate?
a) Mammals in cold climates need warm fur so they evolve thick coats.
b) Natural selection results in organisms that are perfectly adapted to their
environment.
c) Natural selection can only act on populations with genetic variation.
d) Natural selection is a random process.
c) Natural selection can only act on populations with genetic variation.
In the case study for Tutorial #1, you learned about the "Evolution Canyons" that exist
in the mountains of Israel. Singaravelan et al (2010) investigated how the melanin
content of the hair of spiny mice (Acomys cahirinus) has evolved in response to
alternative selection pressures inflicted by contrasting colored habitats of Evolution
Canyon I (ECI). The results of this study show that spiny mice that live on the African
slope of ECI have
a) higher pheomelanin than eumelanin content in their hair.
b) lower pheomelanin than eumelanin content in their hair.
c) coloration that is the same as spiny mice living on the European slope.
d) darker hair than their counterparts on the European slope.
a) higher pheomelanin than eumelanin content in their hair
Natural selection _______________________.
a) is the process by which a population becomes more well adapted to its' environment
over time
b) is the same as evolution
,c) only took place a long time ago
d) is the only evolutionary process
a) is the process by which a population becomes more well adapted to its' environment over
time
The available scientific data indicates that life first arose ______________.
a) 500 million years ago
b) about 3.7 billion years ago
c) less than 10,000 years ago
d) about 3.7 million years ago
b) about 3.7 billion years ago
Amino acids are joined by _________.
a) peptide bonds
b) hydrogen bonds
c) ionic bonds
d) van der Waals interactions
a) peptide bonds
An example of catabolism is the _________________.
a) removal of water from a peptide bond
b) breakdown of starch into simple sugars
c) production of testosterone
d) synthesis of DNA from nucleotide bases
b) breakdown of starch into simple sugars
,If two molecules of glucose (C6H12O6) are joined via condensation synthesis, the
resulting molecule would have a molecular formula of _______________.
a) C12H25O13
b) C12H24O12
c) C12H22O11
d) C6H12O6
c) C12H22O11
Sweat plays an important role in thermoregulation due to the high heat of vaporization
of water. That is, it takes energy to not only raise the temperature of water, but
additional energy is required to make the phase change from water to gas. In
individuals with HED (hypohidrotic ectodermal dysplasia), sweat gland numbers are
reduced. Predictably, what symptoms occur in HED-affected individuals?
a) They would have excessive body odor.
b) They would always be thirsty.
c) They would be prone to heat stroke.
d) There would be no symptoms associated with this condition.
c) They would be prone to heat stroke.
Lipids are predominantly hydrophobic because of their ______________.
a) sugar-phosphate backbone
b) nitrogenous bases
c) phosphate groups
d) hydrocarbon chains
d) hydrocarbon chains
, RNA's nitrogenous bases include ____________.
a) guanine and thymine
b) uracil and thymine
c) uracil and guanine
d) none of these choices
c) uracil and guanine
Ice floats. What would be the consequence to aquatic life if ice sank?
a) There would be no consequence.
b) Aquatic life would suffer in the winter.
c) Aquatic life would suffer in the summer.
d) Aquatic life would benefit in the winter.
b) Aquatic life would suffer in the winter.
There are _________ amino acids that are used by organisms for protein synthesis.
a) 10
b) 20
c) 30
d) 5
b) 20
All of the following are functions of proteins EXCEPT _____________.
a) storage of genetic information
b) skin coloration
c) digestion
d) oxygen transport
