What is one difference between a cell wall and a cell membrane?
a. cell walls do not connect cell to cell. cell membranes connect cell to cell
b. only plant cells have cell walls. only animal cells have cell membranes.
c. the cell wall is a rigid structure. the cell membrane is flexible.
d. cell walls contain vesicles. cell membranes contain plasmids.

Using freezing point depression to find molecular weight lab report

Which best explains how a heat pump can heat a room? cold air from the house is moved through pipes, where it absorbs thermal energy. warm air from outside is pushed into the house to replace the cold air. combustion warms the air when chemical energy is transferred to thermal energy. fuel is used to move a piston, which pushes warm air into the house.

Which best describes a benefit of using dna technology in medicine? a) medicine can be produced in mass quantities. b) medicine can be distributed at a reduced cost. c) medicines have fewer side effects. d) medicines are resistant to antibiotics.