An amino acid molecule includes a central carbon atom bonded to , a carboxyl group, and a hydrogen atom.
an amino group and three fatty acids

an amino group and a nucleic acid

a nucleic acid and an R group

an amino group and an R group

HEL PLEAS

Which of these serves as a reference for comparison during a scientific investigation? a)outcome variable (dependent variable) b) test variable (independent variable) c)control group d)hypothesis

Diego conducted an experiment to find out what kind of ball bounces the highest when dropped from a five-foot platform. he used a golf ball, a tennis ball, and a soccer ball. he dropped each ball from the balcony once. diego recorded his observations after each drop. what can diego do to best improve the reliability of his results? a) drop each ball from the platform three more times b) record his observations in more than one unit c) write at least two scientific questions after the experiment is complete d) share his results with other people who have done similar experiments you for the !

Which step is not included in the step approach to calculating the greatest common divisor?