What happens when the concentration of a solute is equal on both sides of a plasma membrane?
A. the particles will begin to move against the concentration gradient
B. the net movement of particles through the plasma membrane will stop
C. the cell will continue to grow until it finally bursts
D. the cell will begin to shrink because the water levels are not equal
Ans: B. the net movement of particles through the plasma membrane will stop
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Microorganisms that grow in extreme environments typically contain larger genomes when compared to microbes that grow in non-extreme environments
Indicate whether the statement is true or false.
A heartbeat begins in the
A. atrioventricular valve. B. atrioventricular node. C. sinoatrial node. D. right ventricle. E. left atrium.
Hereditarianism is the idea that all human traits are ____
a. partly influenced by environment b. traceable to our earliest ancestors c. influenced equally by genes and environment d. determined only by genes e. immutable from generation to generation
You spray your kitchen with an insecticide to kill the cockroaches. A few survive and reproduce, producing a large healthy population in a few generations that all have similar genetic backgrounds. This is an example ofÂ
A. genetic drift. B. assortative mating. C. migration. D. bottleneck effect. E. mutation.