12.Glycogen is the animal version of ____________ in plants.
Select one:
a. starch
b. chitin
c. cellulose
d. sucrose




13.Lipid is commonly found under the epidermis. Its function is to:
Select one:
a. act as cushioning
b. serve as a primary energy source
c. connect muscle to bone
d. connect one bone to another

14.Carbon makes ___ covalent bonds.
Select one:
a. 4
b. 9
c. 13
d. 15

15.Lipid makes up the __________ in humans.
Select one:
a. hair
b. bones
c. ear wax
d. outer layer of skin

16.The difference between butter and vegetable oil is:
Select one:
a. butter tastes better
b. butter is a fat that is solid at room temperature
c. vegetable oil tends to have more calories than butter
d. butter is less expensive to produce