What is the difference between an electron and a proton

Complete the possible outcomes for each generation in the pedigree chartaa aa aa

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.

Why reason best illustrates why hershey and chase chose to use viruses in their experiment?