What is one reason scientists have developed a system to classify organisms? classification allows for organisms to interbreed and change. a system was needed to better track genetic changes in an organism. classification allows for better identification of new organisms. a system was needed to see microscopic organisms with more detail.

Ans.

Scientific classification involves organization of all living organisms into groups on the basis of similarities found in those organisms. Classification is used to organize all discovered organisms, to identify them, and to properly name them via a standardized naming system.

Thus, the correct answer is option). 'classification allows for better identification of new organisms.'

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.

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.