Of the following materials, which is the most porous?
a. a well-sorted sand
c. sandstone
b. a poorly sorted sand
d. granite

19. scientists use meteorites that hit earth to provide evidence of the composition of earth's interior because they hypothesize that

Students in biology are studying the macromolecules of life. they used a calorimeter to determine the calories in various types of food. once the lab was completed, the students ate the left over food samples. monica commented that in just 6 or 7 "chews" of the saltine, it was gone; nothing but a sticky paste in her mouth. elaborate on what happened chemically while chewing the saltine. include the macromolecules present.

Where does the information about where each transcription factor binds originate?