35 The weighted average of the masses of the isotopes of an element
а.
b.
mass number
isotope
C
d.
atomic number
atomic mass
12
Mass number
(#protons plus
#neutrons)
***
Atomic number
(#protons)
12.011 Atomic weight

The current thought on the structure of the cell membrane is: a. a static phosphate sandwich of lipids b. a fluid-mosaic of phospholipids and proteins c. a bilayer of proteins with static lipid molecules d. an impermeable bilayer of protein molecules e. a static and permeable phospholipid single layer

Which of the following statements is true of cells

Which of the following may one conclude from a map that shows the average ph value of rainfall in the u.s.? acid rain is a more serious problem on the east coast. acid rain falls equivalently across the continental u.s. there are more factories on the west coast. the midwest has fewer forests than the rest of the u.s.