Prior to the elucidation of the genetic code, prominent scientists, including francis crick, had predicted that each mrna codon, coding for one of the 20 amino acids, needed to be at least three nucleotides long. why is it not possible for codons to be any shorter?

Where is energy trapped inside the organelle chlorophyll

What two fields of study provide the core information that is used to classify organisms?

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.