The correct option is c. The sensors for the arterial baroreceptor reflex are located in carotid sinus and aortic arch.
Explanation:
Baroreceptors are primary sensors (or mechanosensitive nerve endings) that detect distention in vascular walls and are stimulated by mechanical deformations during blood vessel stretching. They are located in the carotid sinus and the aortic arch. The stretching the vessel walls at any of these locations causes vasodilation and bradycardia. The baroreceptors detect the stretching of the vessels due to changes in blood pressure, through them a more efficient control of blood pressure is achieved.
Molecule C would be least soluble in water because it is not a polar compound/molecule. It also lacks any unit that can combine with water to form a good hydrogen bond.
The general rule of solubility is that like dissolves likes.
Polar molecules will only dissolve in polar solvent.
Water is a polar solvent with hydrogen bonds in them.
Hydrocarbons typically have weak london dispersion forces between them and they are not polar.
Other compounds have functional groups that can form hydrogen bond with water.
Between each level of the food chain, approximately ninety percent of the energy is lost, and only ten percent of the total energy is transferred from the food source to the consumer for use.