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Any two groups of organisms will have ________ most recent common ancestor(s).

What statement best describes a parasitic relationship?

What statement best describes a parasitic relationship?

The appearance of eukaryotes may have been delayed until more ________ accumulated in Earth’s atmosphere.

The appearance of eukaryotes may have been delayed until more ________ accumulated in Earth’s atmosphere.

The appearance of eukaryotes may have been delayed until more ________ accumulated in Earth’s atmosphere.

If a disease reduces the number of villi within the small intestine one would expect a(n)

Density-dependent factors are more likely to limit population growth when

If a disease reduces the number of villi within the small intestine one would expect a(n)

Within kingdom Protista, the ________ are photosynthetic and may or may not be motile.