8.
you do not need to wear sunscreen in the winter.
true
false
9.
approximately how many different sexually transmitted diseases are there?
95
over 500
6
25
10.
communities can make their neighborhoods safer by
warning people not to come outside.
starting a neighborhood watch program.
turning off the street lights at night.
hiring fewer police officers.

Aresearcher lyses a cell that contains nucleic acid molecules and capsomeres of tobacco mosaic virus (tmv). the cell contents are left in a covered test tube overnight. the next day this mixture is sprayed on tobacco plants. we expect that the plants would ) develop some but not all of the symptoms of the tmv infectionb) develop the typical symptoms of tmv infectionc) not show any disease symptomsd) become infected, but the sap from these plants would be unable to infect other plants

Building muscle has which of the following effects? it increases the metabolic rate. it relieves pressure on the joints. it slows weight loss considerably.

Which statement is false? a. an extinction burst is the complete cessation of the target behavior after the extinction procedure has started. b. extinction procedures should not be used with behaviors that cause serious injury to the subject. c. if the behavior analyst does not have the ability to control the subject's access to reinforcement, an extinction procedure should not be implemented. d. spontaneous recovery of the target behavior will be short-lived, as long as the extinction procedure remains in effect