All amino acids have a similar structure. which component is responsible for the differences in the 20 amino acids

a: the carboxlyic acid

b: the r group

c: the central form

d: the amine group

Greenthe fossil record is the history of life recorded byhuman observationgod.climatologists.remains of the past.

What advantage does a crop that undergoes vegetative reproduction have over plants that start from the seed? 1points a they store nutrients. b they can travel farther. c they experience more genetic variation. d they only occur in high-resource environments.

Which of these structures are found in both plant ans animal cells?