Occurs when gas exchange across the alveolar-capillary membrane is compromised by (a) thickened, damaged or destroyed alveolar membranes, or (b) impaired blood flow through pulmonary capillaries.

The theories on the expansion of galaxies maybe re-examined to strengthen science should not be tested to strengthen science will weaken scientific knowledge if they change will become laws if they don't change

Which two criteria must be met before scientist can use radiocarbon dating? explain your answer

14. which of the following codons code for threonine? a. ucg b. ugu c. cga d. aca