To prevent Polyomavirus from spreading, what precautions should be taken?

a) Birds should be kept together

b) Birds should be brought to another aviary

c) Birds should be isolated from other birds if an infection is suspected

d) Polyomavirus is not a contagious disease

Which of the following is an example of negative reinforcement? a. marty knocks over his mother's prize fern so she gives him a time out. b. gwen mows the lawn and her dad takes her out for ice cream. c. tara takes an aspirin, and her headache begins to go away. d. peter comes in late from his lunch and is fired from his job.

Which of the following types of stars had the smallest initial mass? which of the following types of stars had the smallest initial mass?

How many neutrons does an element have if its atomic number is 40 and its mass number is 156?