What is the origin of mitochondria and How has mitochondria evolved?

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.

Select the correct answer from each drop-down menu proteins are

What materials must dams have to produce electricity, and what must occur?