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The rise of photosynthetic organisms will not ever lead to a decrease in oxygen. The use of these organisms will always lead to an increase.
Adaptions that lead to greater survivability and reproductive success in the immediate environment of the individual organisms under selection pressure.
Lead
They both weight a kilogram. Lead has a higher density.
They both weigh the same: 1kg = 1kg. The kg of butter has a greater volume and the kg of lead has a higher density.
pesticide oil sear lead litter uncollectible garbage trash insectiscide oxygen nitrogen
The weight is greater for 2 atoms of lead.
antinous because he was the lead suitor! duuhhh:P
the same
The organisms that are better adapted to their immediate environment and have greater reproductive success leave a greater representation of their genes in the gene pool of those organisms. Over time the reproductively successful have the majority representation of genes in the gene pool and with this frequency shift evolution has taken place. Evolution is the change in allele frequency over time in a population of organisms. Sometimes, with the proper beneficial mutations and right immediate environment, speciation can take place.
So is
It will lead to mutations in the parent organisms =)