Answer:
The main function of the pulmonary alveoli is to perform the transfer and exchange of gases. In this case, the following gases are included: oxygen, carbon dioxide and gases. Of the elements listed, the only one that is not transferred by the alveoli is the blood.
Explanation:
Jet streams are fast flowing, narrow, meandering air currents in the atmospheres of some planets, including Earth. On Earth, the main jet streams are located near the altitude of the tropopause and are westerly winds. Their paths typically have a meandering shape.
Answer:
A point mutation in the 1st base of a codon
Explanation:
A point mutations are mutations of one base in the DNA sequence. The effects of point mutations might be harmful, beneficial or neutral.
Deletion mutations are frameshift mutation, because they change the reading frame and thus affect the sequence of amino acids produced. Usually, protein changes its structure and function and become useless.
Point mutations at 2nd base of codon are misssense mutations, meaning that the new amino acid is produced, but it can be amino acid with similar properties. That will not affect the function of the protein a lot.
3rd base of a codon are often silent mutations, which means that the sam amino acid is produced (multiple codons can code for the same amino acid).
