In a single sodium-potassium pump cycle, ATP is used with the result that
A. 3 sodium ions leave and 2 potassium ions enter.
B. 2 sodium ion enters and 1 potassium ion leaves.
C. 2 sodium ion leaves and 1 potassium ion enters.
D. 3 sodium ions enter and 2 potassium ions leave.
E. sodium and potassium ions enter and water leaves.
A. 3 sodium ions leave and 2 potassium ions enter.
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Over generations in a population, individuals with higher fitness values will
A. become less prevalent due to natural selection against them. B. become more prevalent. C. stay at the same frequency in the population. D. become less prevalent due to their having less stamina. E. become less prevalent due to natural selection against them and become less prevalent due to their having less stamina are correct.
Agglomeration effects
A) have limited the growth of the computer industry in Silicon Valley. B) typically slow down regional economic development. C) are a form of external economy. D) occur when businesses are located near each other, but are not interdependent with each other. E) include both A and B.
The term filterable viruses was coined by
A. Beijerinck. B. Iwanowsky. C. Twort. D. d'Herelle.
What is not an adaptation to avoid overheating and desiccation? a. A barnacle trapping water inside with calcareous plates
b. A mussel closing its shell at high tide. c. A crab simply moving towards water. d. An anemone covering itself with shell fragments.