ANSWER: C, the continents were at one time joined together.
REASONING: Alfred Wegener was the first person to propose the scientific theory of Continental Drift. Continental Drift is a theory that supposes all the continents were at one time joined together as one large land mass. The mechanisms of continental drift can be explained by Plate Tectonics.
Geologic Time Scale.Scientists decide when an era begins<span> and </span>ends<span>, due </span>to<span> mass extinction. ...</span>Scientists determine<span> when drastic changes </span>are<span> made by the fossil record, which shows earths past organisms that have become extinct.</span>
I believe that the answer C because all the others make no sense and arnt true.<span />
Answer:
Equilibrium between bound and unbound state is necessary for proper drug function, depending on the target areas of the drug therapy.
Explanation:
Plasma protein binding is the degree to which medical drugs are attached to the blood protein, which in most cases is albumin. the efficacy of drug therapy is affected by the extent to which the drug is either bound or unbound to proteins in the bloodstream.
<u>Role of bound state:</u> Unbound drugs dissociate from the bloodstrream and can easily transverse the cell membranes or be diffused, which translates to absorption by the liver and other tissues and directly increases the rate of drug metabolism requirement. Hence the bound state keeps these drugs in the blood and body for a longer period of time.
Consequently, anti-infective drugs targeting the liver and other tissues, must be able to diffuse through capillary membranes to reach its target outside the plasma to the infection site typically located outside plasma.
Subsequently, <em>the law of mass action dictates that the binding of drugs to plasma proteins is reversible, and equilibrium between the protein-bound and unbound drug is quickly established.</em>
