Which part of an amino acid has the greatest impact of the overall structure of a protein? a. the amino groupb. the r groupc. the carboxyl groupd. both a and c

Astudent reads the following text in a science book: scientific evidence tells us that the cause of earths four seasons is the tilt of earth as it revolves around the sound the student is instructed to illustrate this information in a science book. how will the student illustrate winter in the northern hemisphere? a.earths northern hemisphere will tilt away from the sun. b. earths northern hemisphere will tilt toward the sun. c.earths orbit will be farther away than from the sun d. earths southern hemisphere will tilt away from the sun.

Me with biology endocrine system crossword also image left i need with hw

How can we use spectral lines of light coming from the superclusters to identify which is receding from earth at the slowest rate.