<span>Epithelial cells in the stomach require the use of coupled transport to make gastric acid. They use hydrogen potassium ATPase, which is an electroneutral pump, and exchanges potassium for hydronium in order to produce the gastric acid.</span>
An indicator species<span> is an organism whose presence, absence or abundance reflects a specific environmental condition. </span>Indicator species<span> can signal a change in the biological condition of a particular ecosystem, and thus may be used as a proxy to diagnose the health of an ecosystem.
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The answer is False. Stalagmite is a cone-shaped <span>deposit of calcite that builds up on the floor of a cave.
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Answer:
"U"-shaped, with peaks at the low and high extremes of beak size; disruptive selection
An organism that can live in only one particular environment or that can survive on only one type of food would be called a specialist.