Why do your stomach and intestines need a greater supply of blood when they are digesting food?

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?

Name one similarity and one difference between the morphology of a brachiopod and a bivalve

What element does susan b. anthony include in this passage to strengthen her argument?