How long ago did the common ancestor of all organisms do this phylogenetic tree exist

micro/nanoscale topography surface exhibits many prominent properties and is extensively employed in biomedical device, microfluidic device and energy device fabrication. additionally, the clinical applications of biomaterials can be largely expanded with of nanostructured surfaces.

any abiotic or biotic factor in an ecosystem that causes a population's size to slow or decrease is a limiting factor.

oxygen = 21% of the atmosphere

nitrogen = 78%

carbon dioxide = 0.1%

argon =0.934%