heled air and answer the questions that follow. Gas Proportion of gases in different air samples (%) Exhaled air Inhaled air At rest During exercise 0,04 4 9 Carbon dioxide Oxygen 21 17 12 Nitrogen 78 78 78 1 Draw a bar graph to represent the exhaled air. (7) 2 Name ONE common gas, not shown in the table, which would most like ore concentrated in exhaled air than in inhaled air. (1)​

Which statement correctly describes a way that mutations increase the likelihood that a species will survive in a changing environment

If assuming tasting ptc as a simple gene trait, what other genotype would you select to put in this missing genotype box that could result in this phenotype

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.