In a microscopic field showing an artery and its corresponding vein, you can easily distinguish the two because

Answer;

-Veins have thinner walls and are irregular in shape

In a microscopic field showing an artery and its corresponding vein, you can easily distinguish the two because veins have thinner walls and are irregular in shape.

Explanation;

-The walls of the arteries are found to be thicker than that of a vein because the blood that is carried from the heart to the capillaries has more high pressure.

-To withstand the pressure of the blood coming out from the heart, arteries need thick walls. The returning blood in the veins is under low pressure. Because of the lower pressure, vein walls are thinner.

answer; ///i do believe that the correct answer is (c) hold atoms together to form compound;

ans.

dna fingerprinting is defined as a process that determines the dna characteristics of an individual. these dna characteristics are unique among individuals as their fingerprints, so it is known as dna fingerprinting.

steps of dna fingerprinting includes extraction of dna from sample, amplification of dna, restriction digestion of amplified dna, and then analysis of dna by gel electrophoresis, respectively.

thus, the next step performed by the scientist is 'to cut the amplified dna (obtained by polymerase chain reaction) by restriction enzymes that cleave the dna into fragments and their analysis.'