Describe the evidence that showed that the genetic material of bacteriophage viruses was DNA (This was the Hershey-Chase experiment using the radioactive sulfur and phosphorus.).

Apart of an ecosystem that can restrict the growth of a population is referred to as

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.

Which is not a characteristic of bacteria? a. they are unicellular. b. they are prokaryotic. c. they are the smallest form of life on earth. d. they are multicellular.