A(n)is a proposed, testable explanation for an observation. A(n) is a factor that changes during an experiment.
A(n) in an experiment yields data against which other groups are compared.
A(n) differs from the control group by the one variable that is being tested in the experiment.

What can be said about farmers in highly developed countries? a) they have little or no negative impact on the environment. b) they practice subsistence agriculture. c) they are able to incorporate polyculture into their farming practices. d) they utilize organic farming techniques on a regular basis. e) they rely on large amounts of energy from fossil fuels.

What pattern of migration do whales follow?

Suppose you were the commissioner of corrections for your state. which correctional activities might come within your domain? which mostly would not