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If the tubes remained clear after adding reagents A and B in a nitrate reduction test, and then you got the indicated result after adding zinc dust, it would mean __________.

Which of the following make(s) eosin methylene blue agar selective?

Which type of organisms produce hemolysins?

How is the inoculation of a broth tube and a slant tube different?

A shared ancestral character is

What is the founder effect?

Evolution

There is still some controversy among biologists about whether Neanderthals should be placed within the same species as modern humans or into a separate species of their own. Most DNA sequence data analyzed so far indicate that there was probably little or no gene flow between Neanderthals and Homo sapiens. Which species concept is most applicable in this example?

A phylogenetic tree constructed using sequence differences in mitochondrial DNA would be most valid for discerning the evolutionary relatedness of

Dogs (Canis lupus familiaris) and gray wolves (Canis lupus) can interbreed to produce viable, fertile offspring. These species shared a common ancestor recently (in geologic time) and have a high degree of genetic similarity, although their anatomies vary widely. Judging from this evidence, which two species concepts are most likely to place dogs and wolves together into a single species?