Answer:
Paleontologists didn't have the technology in that time to get a good estimation on the events. Back then, they had to rely on natural sources "markers" that made the estimations. Those estimations weren't accurate. Today's measures are accurate.
In The metabolism of amino acids for energy, what is the fate of the amino group?
Excreted as urea
The pond ecosystem includes abiotic factors such as soil, precipitation,temperature etc as well as biotic communities that live there such as lilies,fish,insects, and more
