In a deoxyribonucleotide, what chemical group is found at the 2' carbon of the sugar component? an amino group
a hydroxyl group
an oxygen
a hydrogen
one or more phosphate groups

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 phrase is the best summary of the model shown? a. the transfer of the sun's energy through trophic levels b. a series of aerobic and anaerobic reactions c. a transformation of light energy into chemical energy d. the breakdown of food molecules

How can you tell the difference between rough er from smooth er?