Which is a good example of adaptive evolution? the red fox that inhabits farmlands and forests has a red coat, but its relative, the kit fox, lives in a desert has a sandy–colored coat. two birds of the same species separate during their migratory flight. after several years, their descendants are quite different from each other. two species of fish try to swim against the current near a waterfall. one survives, but the other doesn't.

The diagram below shows the layers of a rock having a trilobite: a rock column labeled rock is shown. the column has three layers. the bottommost layer of the rock has one shaded rhomboid shape, the middle layer has a rhombus with a diagonal along with two identical organisms marked as, trilobite, in the key, the top layer has two semicircles. a key is shown on the right side of the diagram. the shaded rhombus is marked as a, the rhombus with the diagonal is marked as b, the semicircle is marked as c which statement about the rock fossils is true?

How is the expression of surface antigens on red blood cells determined?

As human red blood cells mature, they lose their nuclei. as a result of this loss, which process would be impossible for mature red blood cells to carry out?