Identify the factors that made early Earth a hot planet.

Which best explains why there are 64 possible codons in the genetic code and only 20 amino acids that make protiens of living organisms on earth

Hurry which of these is true about index fossils? a) are very scarcely found b) used as guides in relative dating c) found in the youngest layer of the rock d) used as reference points in absolute dating

The reactions that occur in the ribosome, where amino acids are combined to form proteins are anabolic or catabolic?