What condition causes pumice to be so porous

In which case would a scientist choose to use a dissecting microscope rather than a compound microscope

Many animals cannot sweat to maintain a stable body temperature. what is one other way animals can cool down?

How is the national wildlife refuge system similar to the pacific region coastal program? a. both programs are concerned with providing habitats for wildlife b. both programs are primarily concerned with preserving fish species c. both programs have set aside 150 million acres of land d. both programs are under the u.s. fish and wildlife service