It does not include plant sources.
The answer to this question is letter C. <span>The organism evolved during identification.
</span>A scientist has correctly gone through all the possible steps in a dichotomous key, but has not identified an insect. He was not able to identify the insect because t<span>he organism evolved during identification.
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Choices to this question are:
A) The scientist must have made a mistake.
B) The insect might be an unknown variation or a new species.
C) The organism evolved during identification.
D) The dichotomous key had to many questions.
There is more to DNA than cytochrome c. This is just one protein.
Echinoderms are most closely related to chordates because both are: <span>D)Ectotherms</span>
