In the study involving periwinkle snails and their algal food sources, which conclusion can be drawn?
a. Periwinkles eliminated all algae and died out.
b. Periwinkles eliminated all of the less dominant algae species.
c. Periwinkles eliminated the dominant algae entirely.
d. Periwinkles had no effect on the algae populations.
e. Periwinkles can increase or decrease species richness depending on which algal species it
is consuming.
E
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The antidiuretic hormone works on ____ that encourages the kidneys to reabsorb water
a. a positive feedback loop b. a negative feedback loop c. the proximal tubules of nephrons in the kidney d. the action potential e. the muscle tissue
Muscular contraction moves food through the alimentary canal by a process called ________
A) propulsion B) active transport C) peristalsis D) swallowing
Nucleosomes are comprised of how many molecules of histones?
What will be an ideal response?
Genetic regulation in bacteria can involve alterations in RNA secondary structure. What phenomenon occurs in the trp operon that involves such alterations?
A) transcription B) intron processing C) attenuation D) polyadenylation of the 3? end of the mRNAs E) capping