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Week 7 Quiz Started biology questions with answers

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Question 1 0.5 pts survive in all possible environments. reduce mutation rate. adjust to environmental changes. hybridize. Evolution by natural selection allows species to Question 2 0.5 pts It is an increase in the adaptiveness of many species that have already evolved. It is the process by which natural selection improves the match between a population and its environment over generations. It is large-scale movement of a single species over a new geographic area. It occurs when a more adapted species causes the extinction of a less adapted one. Which of the following statements is true about adaptation? Question 3 0.5 pts This study source was downloaded by from CourseH on :33:05 GMT -05:00 Quiz: Week 7 Quiz 10/10/18, 10'51 PM force new color mutations to occur. improve the match between guppies that reproduce and their environment. change the color preferences of female guppies. convert a dominant allele into a recessive allele. When a brightly colored guppy population is placed in an area containing many visual predators, the population changes in only a few generations to one containing only guppies with drab, dull colors that blend into their environment. This is an example of how natural selection can Question 4 0.5 pts organisms that reproduce sexually. species that cannot produce hybrids. organisms known only from fossils. species whose ranges overlap. Using the biological species concept as a method of defining a species is NOT useful for Question 5 0.5 pts According to the biological species concept, a species is defined when individuals of the same species This study source was downloaded by from CourseH on :33:05 GMT -05:00 Quiz: Week 7 Quiz 10/10/18, 10'51 PM differ widely in their DNA sequences. always have the same physical traits. are capable of interbreeding and producing fertile offspring. must reproduce asexually. Question 6 0.5 pts gene flow. continental drift. speciation. genetic drift. Populations within a species are connected by Question 7 0.5 pts can occur any time genetic divergence occurs. can only occur when two populations are geographically isolated. can only occur when two populations are sympatric. is a process that stopped occurring thousands of years ago. The formation of a new species This study source was downloaded by from CourseH on :33:05 GMT -05:00 Quiz: Week 7 Quiz 10/10/18, 10'51 PM Question 8 0.5 pts adaptation genetic differences gene flow directional selection Geographic isolation limits the ________ between separated populations of a species. Question 9 0.5 pts hybrids. geographically isolated. artificially isolated. ecologically isolated. Two species live in the same area but breed in different parts of their habitat. These species are Question 10 0.5 pts birds Which of these groups of animals has the greatest number of species? This study source was downloaded by from CourseH on :33:05 GMT -05:00 Quiz: Week 7 Quiz 10/10/18, 10'51 PM insects reptiles mammals

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Quiz: Week 7 Quiz 10/10/18, 10'51 PM




Week 7 Quiz
Started: Oct 10 at 9:42pm

Quiz Instruc!ons

Question 1 0.5 pts


Evolution by natural selection allows species to


survive in all possible environments.

reduce mutation rate.

adjust to environmental changes.

hybridize.




Question 2 0.5 pts


Which of the following statements is true about adaptation?


It is an increase in the adaptiveness of many species that have already evolved.

It is the process by which natural selection improves the match between a population and its
environment over generations.

It is large-scale movement of a single species over a new geographic area.

It occurs when a more adapted species causes the extinction of a less adapted one.




Question 3 0.5 pts

https://canvas.csun.edu/courses/43835/quizzes/103109/take Page 1 of 9
This study source was downloaded by 100000840275362 from CourseHero.com on 06-18-2022 16:33:05 GMT -05:00


https://www.coursehero.com/file/34341988/Quiz-Week-7-Quizpdf/

, Quiz: Week 7 Quiz 10/10/18, 10'51 PM




When a brightly colored guppy population is placed in an area containing many visual
predators, the population changes in only a few generations to one containing only
guppies with drab, dull colors that blend into their environment. This is an example of how
natural selection can


force new color mutations to occur.

improve the match between guppies that reproduce and their environment.

change the color preferences of female guppies.

convert a dominant allele into a recessive allele.




Question 4 0.5 pts


Using the biological species concept as a method of defining a species is NOT useful for


organisms that reproduce sexually.

species that cannot produce hybrids.

organisms known only from fossils.

species whose ranges overlap.




Question 5 0.5 pts


According to the biological species concept, a species is defined when individuals of the
same species




https://canvas.csun.edu/courses/43835/quizzes/103109/take Page 2 of 9
This study source was downloaded by 100000840275362 from CourseHero.com on 06-18-2022 16:33:05 GMT -05:00


https://www.coursehero.com/file/34341988/Quiz-Week-7-Quizpdf/

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