if dad and mom (first generation) have two children (second generation), how many descendants will there be in the following six generations if each child has the same number of children as their parents (22)?

Many kangaroo rats live in the sonoran desert of the southwestern united states. they have a variety of adaptations for living in the desert. under which circumstance would the kangaroo rats of the sonoran desert be most likely to develop new adaptations by natural selection?

How do accessory pigments chlorophyll?

The finches on the galapagos island were similar in form except for variations of their beaks. darwin observed that these variations were useful for: attracting a mate defending territory building nests gathering food