No, it's not B. The energy needed to "pump" sodium outside the cell in active transport is ATP. When ATP releases energy (for metabolism usage) during active transport, the sodium is discarded.
The Vmax of the enzyme is 12 μmol⋅min−1
We use Michaelis-menten equation, which is given by;

Where v is velocity of reaction
Vmax = maximum rate achieved by the system
[S] = concentration of a substrate
K
= Michaelis constant
Given V
= 10
[S] = 5km
Now, we calculate Vmax:
10
= 
Km = 1


=12 μmol⋅min−1
Learn more about Michaelis-menten kinetics here:
brainly.com/question/15180587
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Answer:It may be the only way to perpetuate particular cultivars.Or
It maintains the juvenile or adult characteristics of certain cultivars.
Explanation:
If this is not the answer you want sorry i tried my best. :)
A phospholipid bilayer or lipid bilayer is a double layer of lipids in a cell membrane which has a hydrophobic and a hydrophilic part.
Hydrophobic - expelled by water
Hydrophilic - attracted to water
The layers form the cell membrane which means that it's functions are the same as the functions of a cell membrane, and are critic to the cells functioning.
Hope it helped,
BioTeacher101