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

Which best describes the nucleus of an atom a. it is where all of the particle s of the atom are located b. it is the negatively charged part of the atom c. it is where the electrons and the protons are located d. it is the part of the atom with the greatest mass

The fluid mosaic model of the membrane proposed that membranes

What will happen if two of the base pairs of the stand of the dna are switched