Researchers are training pigeons to peck to receive food pellets ...

[joe]

Researchers are training pigeons to peck to receive food pellets when they see gratings but withhold their pecks to receive pellets when they see a uniform gray circle. This procedure will help the researchers determine
 
  a. whether or not pigeons can see color.
 b. whether or not pigeons have feature detectors.
 c. how much contrast a grating must have before it looks different from the gray circle to a pigeon.
 d. whether pigeons are intelligent enough to learn to peck one stimulus rather than another.

Question 2

Which of the following factors contributes the least to feelings of thirst?
 
  a. feelings of a dry mouth
 b. a reduction in intracellular fluid levels
 c. a reduction in extracellular fluid levels
 d. an increase in the concentration of extracellular solutes

[alexanderhamilton]

Answer to Question 1

c

Answer to Question 2

a

[joe]

Thank you

[alexanderhamilton]

No problem