Answer:
The correct answer will be- ADH alters the reabsorption of water and RAAS leads to the reabsorption of sodium ions.
Explanation:
To maintain the osmolarity of the blood in the human body, the body activates the RAAS pathway and the production of ADH.
RAAS pathway gets activated when the receptors sense low blood pressure in the body. This activates the production of renin from the juxtaglomerular cells of the body which converts the angiotensin to angiotensin I and later angiotensin II.
This allows the reabsorption of sodium ions in the blood through proximal and distal tubules in the nephron. This activates the synthesis of aldosterone which increase the permeability to sodium ions.
The Antidiuretic hormone helps regulate the low blood pressure by adding aquaporins to the distal tubule membrane which help absorb the water.
Thus, ADH alters the reabsorption of water and RAAS leads to the reabsorption of sodium ions is the correct
Creationists criticize the idea of natural selection as a circular argument, or tautology, claiming "the fittest are those that survive, and survival is how fitness is defined. "
The definition of natural selection is not tautological because natural selection is measured by contribution to the next generation, not simply survival of an individual organism.
Tautologies or circular arguments are true at all times and therefore are not productive as theories since they cannot be disproved. A tautology is a statement which is true by necessity.
Natural selection is the prevalent theory which explains biological change by predicting the mechanism behind evolution.
Nevertheless, natural selection can be explained non-tautologically. It should be described as the theory which tries to speculate as well as retrodict evolutionary change by environmental forces affecting the organisms.
To learn more about natural selection here
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