The element with atomic number of 4 is

What does all of the organ system in a human form

In dna, only the_ varies from one nucleotide to another. base phosphate sugar amino acid

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.