Akey problem for darwin was accounting for the origin of variation on which selection might act. in two or three sentences, contrast darwinâs ideas on the origin of variation with modern views.

In general in which direction does wind blow

Blood made up of red and white blood cells work together to form

Darius is observing a family of geese, which includes a male goose, female goose, and several goslings. when a dog approaches the geese, the male goose hisses at the dog and flaps its wings threateningly. is the behavior of the male goose an example of an adaptation?