D: The cell is the basic unit of structure and organization in organisms. Explanation: cause I got the question right.
A heart murmur is a condition in which abnormal heart sounds
are determined with the help of a stethoscope. Normally, a heart valve makes a
distinct clicking sound when it snaps shut. With a murmur, the click is
replaced by a sound similar to blowing. This abnormal sound can indicate the
turbulent flow of blood through a narrowed valve or backward (retrograde) flow
back toward the atria then through a broken valve.
Because the grand canyon was formed in the ocean and the ocean was filled with organisms
