Which of the following is an example of operant conditioning? a. when a dog plays dead she gets a treat in order to encourage her to repeat the behavior b. when a cat learns to drool at the sound of a can opener c. when a dog refuses to play dead d. when a cat and a dog share the same water bowl.

B

Explanation:

It's the same thing that Pavlov did with the dogs, but instead of a can opener, he used a bell. The dogs drooled at the sound of the bell because they knew that the food was coming.

humans are now responsible for causing changes in the environment that hurt animals and plant species. we take up more space on earth for our homes and cities. we pollute habitats. human activity often changes or destroys the habitats that plants and animals need to survive.

during the process of dna replication, brdu can replace thymidine and incorporate into the newly synthesized dna, cell proliferation thus can be reflected in the extent of brdu incorporation.