Which statement BEST hypothesizes the evolutionary history of the area shown? A) The area was once an ocean and was replaced by taiga and coniferous forest. B) The area was once covered by an ocean and was replaced by temperate deciduous forest. C) The area was once a temperate deciduous forest and was replaced by a freshwater lake. D) The area was once a freshwater lake, but it was replaced by the expansion of an ocean.

Which best describes red blood cells? a. they are colorless b. they protect against disease-carrying microorganisms c. they transport oxygen throughout the body d. they aid in blood clotting

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.

Which of the following is a period in the paleozoic era? devonian cambrian permian all of the above