Explain the reasons for changes in how organisms are classified.

Due to overlapping classifications and inability to classify organisms with limited information

Explanation:

Earlier the classification systems were based on the similarities and dissimilarities between the morphological traits of organisms. However, with discovery of more and more species it was found that several organisms with in the same species have different characteristics while organisms from different species have similar characteristics. In order to study all these variations , genetic engineering was used. This lead to a newer classification system where species are now defined based on their genetic structure and evolutionary history.

This new approach of classification also led to creation of new sub species group within the same species.

the oxygenated blood then leaves the lungs through pulmonary veins, which return it to the left heart, completing the pulmonary cycle. this blood then enters the left atrium, which pumps it through the mitral valve into the left ventricle. from the left ventricle, the blood passes through the aortic valve to the aorta.

deoxygenated blood leaves through the right ventricle through the pulmonary artery. from the right atrium, the blood is pumped through the tricuspid valve (or right atrioventricular valve), into the right ventricle.

im not intirely sure but i think the anwser is d relative humidity