How is pushing a ball up a ramp like active transport?

Which best explains why there are 64 possible codons in the genetic code and only 20 amino acids that make protiens of living organisms on earth

Is there any species that went extinct in recent years due to natural causes (not caused by human interaction). if so, what caused it?

The main ingredient of magma is a pahoehoe. b silca c dissolved gases d obsidian