Tryptophan is the precursor to the synthesis of brain serotonin. The pH of the brain is buffered at 7.2. What substance(s) would you use to make a buffer with a pH close to that of the brain

the answer is:

carbon dioxide

they have identical fossils of organisms that have evolved over time.

both have animal fossils preserved in them due to weathering and erosion.

they contain different fossils because life on earth has changed through time.

the fossils in them were formed on the surface of earth due to exposure to sunlight.

answer denitrification;