21. For each of the following measurements, give the correct si unit and then English units. a. Mass
b. Volume
c. Time
d. Length
e. Temperature
f Weight
22. Convert the following measurements.
a. 2000 mg =
8
b. 480 cm =
C. 6.3 cm =
ודוח
d. .6 kg =
8

i do not know and i have a 100 in this class

many other transport proteins, often called pumps, move materials against a concentration gradient. active transport drives molecules across a membrane from a region of lower concentration to a region of higher concentration. this process, shown in figure 5.1, uses transport proteins powered by chemi- cal energy.