The adjustable opening in the center of the eye that control the amount of light entering the eye is called the a. cornea b. fovea c. pupil d. iris

The correct answer would be c. pupil.

Pupil refers to the adjustable opening present at the center of the iris.

It appears as a black hole present at the center of the eye through which light is passed into the eye.

The iris is muscular and contractile structure present around the pupil.

The pupil regulates or controls the amount of light entering the eye with the help of iris.

Iris through its contractile nature regulates the size of the pupil and thus, it controls the amount the light passing through the eye.

her next move would be to use agarose gel electrophoresis to separate the dna molecules of varying length and create a dna fingerprint.

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.