B. Bicarbonate
<em>The blood brings bicarbonate to the lungs, and then it is exhaled as carbon dioxide. The kidneys also help regulate bicarbonate... it is excreted and reabsorbed by the kidneys.</em>
<em>The body's main response is to get rid of more carbonic acid and hold on to as much bicarbonate base in the kidneys as it can.</em>
Because the molecules that are being transported is moving against its concentration gradient. in other words, its moving from where its low in concentration to where its high in concentration
A) earthquakes cause seismic waves.
The percentages of the daily values on food packages are given in terms of a person requiring 2000 calories each day
A variation that results in increased fitness is more likely to be passed on because the individual will reproduce. thus option B is correct.
<h3>
What is variations?</h3>
Genetic diversity is endlessly possible as a result of sexual reproduction. In other words, sexual reproduction produces genetically distinct offspring. They are different from one another as well as from their parents.
Variation will be passed on through reproduction. reproduction results in genetic variation which increase the chance of survival of new organisms.
Learn more about variation here:
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