Four of the five answers listed below are
related by a common phase of mitosis. Select
the EXCEPTION.
a. beginning of microtubule assembly outside
the nucleus
b. division of centromeres
c. disappearance of nucleolus
d. disappearance of nuclear membrane
e. shortening and condensation of
chromosomes make them more visible
B
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In addition to a vertebral column, all vertebrates have
A. scales. B. gills. C. an open circulatory system. D. a tunic. E. a distinctive head or skull.
During normal climatic conditions with regular rainfall, the average beak depth for a population of finches was 6.8mm. Researchers found that after a drought, average beak depth increased to 8.8mm. Birds with deep beaks (>9mm) were better able to eat large, hard seeds. Small hard seeds were also available after the drought, but could only be eaten by birds with shallow beaks (<7mm). Choose the graphical representation and term that best represents what would happen in the post-drought finch population if both types of seeds continue to be available.
A. 
balancing selection.
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B. 
stabilizing selection.
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C. 
negative frequency-dependent selection.
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D. 
disruptive (diversifying) selection.
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E. 
directional selection.
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Which is not correct about genital warts?
A. Treatment can involve laser surgery. B. It is the most common STD in the United States. C. They are strongly associated with cancer of the cervix. D. The etiological agent is the human polyoma virus JC. E. They are strongly associated with cancer of the penis.
True or false: mutations always result in the death of the organism which acquires them
A. true B. false