How does the structure of the plasma membrane serve the needs of the cell? - It is impermeable to solids, allowing only liquids and gases to pass through it.
- It is dense and rigid, protecting the cell from external changes.
- It is embedded with proteins, which permit the passage of certain materials.
- It is made up of lipids, which tend to repel water, so water cannot pass through it.

answer; a male inherits only one allele of the x-linked gene controlling hair color;

a physical change is being made.

hypoxemia refers to a below usual concentration of oxygen in the blood, mainly in the arteries. hypoxemia is an indication of an issue associated with circulation or breathing and may lead to various symptoms like shortness of breath.  

the condition is identified by determining the level of oxygen in the blood sample obtained from an artery. it can also be predicted by determining the oxygen saturation of the blood with the application of a pulse oximeter.  

the normal arterial oxygen is about 75 to 100 mm hg. the values underneath 60 mm hg is generally considered with the requirement for supplemental oxygen. the normal pulse oximeter readings generally range between 95 to 100 percent. the values under 90 percent are regarded as low.  

in the given case, the oxygen saturation is measured at 93 percent, hence, there is no need to administer oxygen, that is, one should withhold oxygen.