A number of different phylogenies (evolutionary tress) have been proposed by scientists. These phylogenies are useful because they can be used to
A. determine when two similar populations of a species evolved into two separate species
B. Evaluate which groups of organisms may be most closely related
C. demonstrate that all photosynthetic organisms are members of the Kingdom Plantae
D. demonstrate that natural selection is the prevailing force in evolution
E. demonstrate which taxa (groups of organisms) contain the most highly evolved species
Ans: B. Evaluate which groups of organisms may be most closely related
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Calculate the Shannon diversity index for each marsh. Round your answers to three decimal places and separate answers with a comma and one space. Community Species Low marsh High marsh 1 19 2 2 26 6 3 15 82 4 0 2 5 0 3 Total 60 95 The Shannon diversity index for the low marsh and high marsh are:
What will be an ideal response?
The most common spatial distribution among individuals within a population is clumped
Indicate whether the statement is true or false
________is formed when atom gained or loose electrons.
a. molecule b. isotops c. ions
Vaccine prevention of acute respiratory infections (the common cold) is unlikely because
A) there is a relatively low social and economic cost associated with the common cold. B) colds are easily misdiagnosed as something else. C) antibiotics easily cure the common cold. D) there are many distinct virus strains and serovars that cause the common cold. E) humans do not generate a strong immune response to common cold viruses.