If the dispersive model of DNA replication had been correct, Meselson and Stahl would have observed that DNA extracted from bacterial cells following a second round of DNA replication in 14N would have been:.
a. only of hybrid density, and somewhat light than after one round of replication.
b. only of hybrid density, and somewhat heavier than after one round of replication
c. of varying densities, spread throughout the gradient
d. all light density because the DNA molecules would have mostly 14N

the cost of mining is extremely low compared to the money earned from mining, creating income to improve the environment.

b a mature ovary of a plant.

answer;

-vessels in the chest

the diagnosis of angina pectoris literally means "vessels in the chest"

explanation;

-angina pectoris is the medical term for chest pain or discomfort due to coronary heart disease.it is the chest pain due to an inadequate supply of oxygen to the heart muscle. the pain is typically severe and crushing, and it is characterized by a feeling of pressure and suffocation just behind the breastbone.

agina pectoris is caused by reduced blood flow to your heart muscle. the blood carries oxygen, which the heart muscle needs to survive. when the heart muscle isn't getting enough oxygen, it causes a condition called ischemia