Genetic drift scientific explanarions are based on empirical data and evidence
The two gasses that make up 99% of the earth's atmosphere are nitrogen and oxygen.
Hope that helped! =)
I will say Large piscivorous fish since i figure that it eats it.
You find a 10,000,000 year old rock 2,500 km away from the
nearest seafloor spreading center. The plate has been moving since its
formation by (2,500 km)(100,000 cm/1 km)/(10,000,000 yr).so the plat has been
moving equal to 25 cm per year since its formation.