Which best explains what happens during crossing over? the chromosomes have electrical connections that allow them to line up randomly. paired chromosomes overlap and portions of dna switch between chromosome. genetic material is switched because the chromosomes line up independently. chromosomes line up randomly and cross genetic information between unpaired chromosomes. which best explains what happens during crossing over? the chromosomes have electrical connections that allow them to line up randomly. paired chromosomes overlap and portions of dna switch between chromosome. genetic material is switched because the chromosomes line up independently. chromosomes line up randomly and cross genetic information between unpaired chromosomes.

his research revealed two genetically different groups of prokaryotes, which justified splitting kingdom monera into two kingdoms. the genetic and cellular differences were so great, that these two kingdoms were eventually placed into different domains in the current three-domain system.

the fossil record provides evidence of a common ancestor to many species.

idk im sorry.

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.