Which best describes an adaptation that could be found in a fish that lives in a slow-flowing stream?
the ability to attract prey by glowing
extra gills, for oxygen extraction
the ability to grow larger
extra fat, for warmth

Marianne is comparing two animals: a fruit fly and a fruit bat. she asks, "do a fruit fly and a fruit bat share a common ancestor in their evolutionary history? " according to evolutionary theory, what is the answer to marianne's question?

Astudent observes a star from two positions of earth in its orbit, in summer and winter, and measures the change in the position of the star. which of these can be best calculated by this method?

What could happen if two base pairs on a strand of dna or switched