BIOL 2200 Exam 1 Questions and Answers Fully Solved
chapter 22 - Answers natural selection
The theory of evolution through natural selection is considered a scientific theory because __________.
- Answers All of the listed answers are correct.:
- it is broad enough in scope to explain many observations
-it is supported by a massive body of evidence from many disciplines
-it is general enough to provide many testable hypotheses
An adaptation is - Answers a trait that gives an organism a reproductive advantage in the current
environment
EXP:
Evolutionary adaptations are inherited characteristics that enhance an organism's ability to survive and
reproduce in a particular environment.
evolution - Answers descent with modification. change genetic comp of pop b/t generations.
natural selection 4 postulates - Answers -many offspring produced, not all survive (limited resources)
- traits vary among individuals w/in pop and can be heritable (patterns bt parents and offspring)
- some heritable traits provide benefits/ advantages in environment
- advantageous traits give higher fitness (survival and reproduction) so become more common
Individuals experience selection - Answers populations evolve
Which of the following statements best describes Darwin's theory of evolution by natural selection? -
Answers Darwin's theory emphasized that populations vary and change over time.
, Which of the following observations would provide evidence supporting Lamarck's proposed
evolutionary mechanism of "inheritance of acquired characteristics"? - Answers a decrease in tail length
in dogs after 20 generations of dogs that had their tails docked (cut off) as puppies
hutton - Answers earth is old and shaped by small slow changes-- not well received
malthus - Answers economist. populations would grow unrestricted if resources weren't scarce.
culver - Answers fossils are evidence of extinction
Lamarck - Answers came up with evolution originally- had few things wrong, changes in traits through
life w use and disuse and passed onto offspring. theory of acquired inheritance.
weissman disproved w mice tails
lyell - Answers earth is old and same processes have been shaping it over time. uniformitism.
James Hutton and Charles Lyell provided which of the following ideas that paved the way for Darwin's
thinking? - Answers the surface features of Earth were formed slowly and gradually and the geological
processes are still at work
Why do dark-colored rock pocket mice on dark lava flows have white bellies? - Answers The color of a
rock pocket mouse's belly is not visible to a predator and therefore is not under strong selection
pressure.
Mutations are always __________. - Answers Mutations are rare genetic changes that can be neutral,
beneficial, or detrimental depending on an individual's circumstances. A dark-color fur mutation is good
for a rock pocket mouse living on black lava and bad for one living in the sandy desert.
competitive advantage - Answers A small evolutionary advantage can lead to large changes in a
population. The larger the advantage, the faster the changes occur.
What does Dr. Carroll mean when he says, "while mutation is random, natural selection is not"? -
Answers Natural selection can only work on variation existing in a population. Mutation creates variation
randomly. Natural selection is not random; by determining which traits are passed to the next
generation, it can shape populations.
After a drought in 1977, researchers hypothesized that on the Galapagos Island Daphne Major, medium
ground finches with large, deep beaks survived better than those with smaller beaks because they could
more easily crack and eat the tough Tribulus cistoides fruits. A tourist company sets up reliable feeding
stations with a variety of bird seeds (different types and sizes) so that tourists can get a better look at
the finches. Which of the following events is now most likely to occur to finch beaks on this island? -
Answers increased variation in beak size and shape over time
chapter 22 - Answers natural selection
The theory of evolution through natural selection is considered a scientific theory because __________.
- Answers All of the listed answers are correct.:
- it is broad enough in scope to explain many observations
-it is supported by a massive body of evidence from many disciplines
-it is general enough to provide many testable hypotheses
An adaptation is - Answers a trait that gives an organism a reproductive advantage in the current
environment
EXP:
Evolutionary adaptations are inherited characteristics that enhance an organism's ability to survive and
reproduce in a particular environment.
evolution - Answers descent with modification. change genetic comp of pop b/t generations.
natural selection 4 postulates - Answers -many offspring produced, not all survive (limited resources)
- traits vary among individuals w/in pop and can be heritable (patterns bt parents and offspring)
- some heritable traits provide benefits/ advantages in environment
- advantageous traits give higher fitness (survival and reproduction) so become more common
Individuals experience selection - Answers populations evolve
Which of the following statements best describes Darwin's theory of evolution by natural selection? -
Answers Darwin's theory emphasized that populations vary and change over time.
, Which of the following observations would provide evidence supporting Lamarck's proposed
evolutionary mechanism of "inheritance of acquired characteristics"? - Answers a decrease in tail length
in dogs after 20 generations of dogs that had their tails docked (cut off) as puppies
hutton - Answers earth is old and shaped by small slow changes-- not well received
malthus - Answers economist. populations would grow unrestricted if resources weren't scarce.
culver - Answers fossils are evidence of extinction
Lamarck - Answers came up with evolution originally- had few things wrong, changes in traits through
life w use and disuse and passed onto offspring. theory of acquired inheritance.
weissman disproved w mice tails
lyell - Answers earth is old and same processes have been shaping it over time. uniformitism.
James Hutton and Charles Lyell provided which of the following ideas that paved the way for Darwin's
thinking? - Answers the surface features of Earth were formed slowly and gradually and the geological
processes are still at work
Why do dark-colored rock pocket mice on dark lava flows have white bellies? - Answers The color of a
rock pocket mouse's belly is not visible to a predator and therefore is not under strong selection
pressure.
Mutations are always __________. - Answers Mutations are rare genetic changes that can be neutral,
beneficial, or detrimental depending on an individual's circumstances. A dark-color fur mutation is good
for a rock pocket mouse living on black lava and bad for one living in the sandy desert.
competitive advantage - Answers A small evolutionary advantage can lead to large changes in a
population. The larger the advantage, the faster the changes occur.
What does Dr. Carroll mean when he says, "while mutation is random, natural selection is not"? -
Answers Natural selection can only work on variation existing in a population. Mutation creates variation
randomly. Natural selection is not random; by determining which traits are passed to the next
generation, it can shape populations.
After a drought in 1977, researchers hypothesized that on the Galapagos Island Daphne Major, medium
ground finches with large, deep beaks survived better than those with smaller beaks because they could
more easily crack and eat the tough Tribulus cistoides fruits. A tourist company sets up reliable feeding
stations with a variety of bird seeds (different types and sizes) so that tourists can get a better look at
the finches. Which of the following events is now most likely to occur to finch beaks on this island? -
Answers increased variation in beak size and shape over time
