Which statement best defines a protist ?

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?

What is the difference between an igneous, sedimentary and metamorphic rock

Adistinctive characteristic of mammals that is not observed in other vertebrates is