11. The primary job of the cell wall is to a. protect the cell and keep its shape.

b. store DNA.

c. direct and monitor a cell's activities.

d. help the cell move.

12. Which organelle is not found in animal cells?

a. mitochondrion

b. ribosome

c. chloroplast

d. smooth endoplasmic reticulum​

The substances that are necessary for producing of certain hormones and that store and transport vitamins

If two parallel light rays hit a mirror, they will not be parallel to each other after they reflect.

Acommercial refrigerator with refrigerant-134a as the working fluid is used to keep the refrigerated space at -35°c by rejecting waste heat to cooling water that enters the condenser at 18°c at a rate of 0.25 kg/s and leaves at 26°c. the refrigerant enters the condenser at 1.2 mpa and 50°c. if the compressor consumes 3.3 kw of power, determine (a) the mass flow rate of the refrigerant, (b) the refrigeration load, (c) the cop, and (d) the minimum power input to the compressor for the same refrigeration load.