The cell membrane is considered what?
semi-permeable.
porous.
all of the above
fully permeable.

Semi-permeable

Explanation:

Some small, nonpolar molecules can slip right through the membrane such as oxygen and carbon dioxide but larger, polar molecules must go through special protein channels which may require energy to transport molecules through the membrane. Water for example cannot pass through the membrane so it passive transports itself through aquaporins. Glucose also uses protein channels.

Because only certain molecules can diffuse right through the membrane, it is semi-permeable.

c. genetic engineering

explanation: