What happens to ideas in science? a. they do not often influence the way people live their lives. b. they become theories that no one is allowed to question. c. they get modified or replaced as new ones are developed. d. they are rarely proven wrong over a period of time

The vaccine in a flu shot contains weakened flu viruses. how does a flu shot work with the immune system? a. it destroys lymphocytes. b. it destroys macrophages. c. it activates macrophages. d. it activates lymphocytes.

Cathy hypothesized that corn would not grow in mud. to test this hypothesis, she took corn kernels and placed 5 in mud, 3 in soil, and 2 in water. to her surprise, the kernels in the mud grew faster than the kernels in the soil. what error might have caused these unexpected results? a. wrong hypothesis b. not enough variables c. undefined control d. too many variables

There are fewer than 100 naturally occurring elements in the universe, but there are millions of different unified substances. explain how this can be true.