Blood enters into the heart from the body through the? A. right ventricle
B. left ventricle
C. right atrium
D. left atrium

The right atrium

Explanation:

Blood enters through the right atrium the flows to the right ventricle which then pumps the blood to the lungs where it becomes oxygenated. The oxygenated blood is then returned to the heart via the pulmonary veins which enter the left atrium.

phylogenetic tree is the tree of life or evolution tree. it shows the different branches of evolution. the sequence goes like tissues - coelom - backbone - endoskeleton - segmentation

what have scientists found to be the most efficient and effective way to insert new sequences into an individual? a-scientists have created genetically altered foods that release dna during digestion. b-scientists use viruses to insert specific gene sequences. c-scientists irradiate genes so that they can be absorbed through the skin.