Exam (elaborations)
BIO 117 Exam 1 Questions with Complete Solutions
- Course
- Bio 117 WVU
- Institution
- Hondros College School Of Nursing
BIO 117 Exam 1 Questions with Complete Solutions
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BIO 117 Exam 1 Questions with Complete SolutionsWhat is an adaptation? CORRECT ANSWER a trait that improves the fitness of its bearer, compared with individuals without the trait
How can biological fitness be estimated? CORRECT ANSWER Count the number of healthy, fertile offspring produced by different individuals
in a population.
All of the following are true for natural selection EXCEPT:
- Variation exists in populations (all individuals are NOT the same).
-Characteristics acquired by individuals over the course of their lifetime,
e.g. big muscles from weight lifting are passed on to their offspring.
-There is differential reproductive success within populations, i.e. some individuals have more offspring than others.
-The fittest individuals leave the most offspring. CORRECT ANSWER Characteristics acquired by individuals over the course of their lifetime, e.g. big muscles from weight lifting are passed on to their offspring.
What is a main driving force behind natural selection? CORRECT ANSWER The environment
Vestigial traits are _____. CORRECT ANSWER remnants of structures that were useful to an organism's ancestors TRUE/FALSE: New traits in a population arise (come into existence) in response to need (i.e. NEED can evoke new alleles in a population). CORRECT ANSWER False
New alleles originate from _______. CORRECT ANSWER mutations
According to ________, traits acquired during an individual's lifetime will be inherited by offspring. CORRECT ANSWER Lamarck
Allele frequencies change as a result of __________.
-Mutation
-Genetic drift
-Gene flow (immigration/emigration)
-Natural selection
-All of the above CORRECT ANSWER All of the above
TRUE/FALSE: Changes in a population occur through small changes in individual members of a population over a very long period of time. CORRECT ANSWER True
Animals that possess homologous structures probably _____. CORRECT ANSWER evolved from the same ancestor
When they were first sold, aerosol insecticides were highly effective in killing flies and mosquitoes. Now, several decades later, a much smaller
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