Which of the following is a characteristic of a scientific experiment? (5 points) a
Its results always support the hypothesis.

b
It shows cause and effect relationships.

c
It is performed in nature.

d
It can be performed only once.

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.