Particle physicists study objects smaller than the atom. Astronomers study systems larger than the Milky Way Galaxy. Why are both fields
considered science even though they study such different objects?

They both use the same tools.
They both use the same basic scientific methods.
They both require the same basic knowledge.
O They are both based on the same set of observations.

Based on anatomical similarities, to which modern animal is dr. digger’s creature most closely related?

How can a geological time scale best be reconstructed? a) comparing vestigial structures in living species b) comparing homologous structures in living species c) examining homologous structures in fossil remains d) examining the written records of scientists from past cultures

The empty trna moves off and picks up another matching amino acid from the cytoplasm in the cell. the anticodon of the trna, with its attached amino acid, pairs to the codon of the mrna, which is attached to a ribosome. this sequence is repeated until the ribosome reaches a stop codon on the mrna, which signals the end of protein synthesis. the ribosome forms a peptide bond between the amino acids, and an amino acid chain begins to form. when a second trna with its specific amino acid pairs to the next codon in sequence, the attached amino acid breaks from the first trna and is bonded to the amino acid of the second trna.