8.The advantage of light microscope over electrons microscope:Required to answer. Single choice. (1 Point)

it doesn't require electric relay

it is easier to move from place to place

it is so expensive

A and B

the correct answer is ( hypoglycemia ); good luck

explanation:

blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium of the heart. as the ventricle contracts, blood leaves the heart through the pulmonic valve, into the pulmonary artery and to the lungs where it is oxygenated.

the answer is true when observing or determining population size, a direct observation is use, in which each organism is counted in a population or in an area. one benefit of this measure is that you get the exact population count but it will take a long time to  determine  the  size  of a  population.