Which is a factor that determines whether a molecule can cross a cell
membrane?
o
a. speed
o b. mass
o
c. texture
o
d. polarity
subm

Dont listen to the other guy the answer is- POLARITY

the organisms are not adapted to live in some communities or habitats.

for example, no new evidence will demonstrate that the earth does not orbit around the sun (heliocentric theory), or that living things are not made of cells (cell theory), that matter is not composed of atoms, or that the surface of the earth is not divided into solid plates that have moved over geological timescales .