DNA polymerase is a type of enzyme that is responsible for forming new copies of DNA, in the form of nucleic acid molecules. Polymers are Nucleic Acid, which are large molecules made up of smaller, repeating units that are chemically connected to one another.
The epithelium tissue which permits gas exchange across the air sacs in the lungs are the simple squamos. It is a layer of flat cells that is in connected with the basal lamina. This part allows molecules that are small to pass by diffusion or filtration.
B is the correct answer. Good luck :)
Answer:
The answer should be letter D
Explanation: