The tips of the branches on a phylogenetic tree represent:

A. present-day groups.
B. common ancestors.
C. analogies.
D. sister groups.
E. homologies.


A

Biology & Microbiology

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Which of the following is not part of the step that occurs between glycolysis and the Krebs cycle?

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When it is important to count the number of cells, determine cell size, and differentiate between dead and live cells, a(n) ________ is used.

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Both the northern coniferous forest and the temperate rain forest are dominated by evergreen vegetation. What are the reasons in each biome?

What will be an ideal response?

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A selected sample is one that is:

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