Identify the structure of the human heart which is valve between the left atrium and left ventricle of the heart, consisting of two triangular flaps of tissue that prevents blood from flowing back into the atrium. also, called the bicuspid valve. (check out the hint) a) mitral valve b) aortic valve c) tricuspid valve d) pulmonary valve

The dna in a cell’s nucleus encodes proteins that are eventually targeted to every membrane and compartment in the cell, as well as proteins that are targeted for secretion from the cell. for example, consider these two proteins: phosphofructokinase (pfk) is an enzyme that functions in the cytoplasm during glycolysis. insulin, a protein that regulates blood sugar levels, is secreted from specialized pancreatic cells. assume that you can track the cellular locations of these two proteins from the time that translation is complete until the proteins reach their final destinations.for each protein, identify its targeting pathway: the sequence of cellular locations in which the protein is found from when translation is complete until it reaches its final (functional) destination. (note that if an organelle is listed in a pathway, the location implied is inside the organelle, not in the membrane that surrounds the organelle.)

Aflashlight battery is an example of a) potential energy b) kinetic energy c) thermal energy d) solar energy

The theories on the expansion of galaxies maybe re-examined to strengthen science should not be tested to strengthen science will weaken scientific knowledge if they change will become laws if they don't change