Bulk movement of water across plasma membranes and the exchange of oxygen from blood into cells are similar in that the method of transport is by:

Aglacier retreats, exposing bare rock and allowing communities of organisms to move in. this is an example of

What is the definition of genes? a. small rna chains that transfer a specific amino acid to a growing polypeptide chain at the ribosomal site of protein synthesis during translation b. sections of dna a cell copies as rna strands to make specific proteins during transcription and translation c. molecules of rna encoding a chemical blueprint for a protein product

Mutations are always harmful happen when dna changes during replication cannot be acquired from the environment decrease the genetic diversity of a population