Who came up with the idea of natural selection? where in the world were they when they came up with the idea?

This is one form of rna that transports a specific amino acid to a ribosome during protein synthesis.

Ais a landform that is formed at the mouth of a river from the deposition of sediment carried by the river as the water flows.

All but one describes an effect of aging on the digestive system. a) decreased acid secretion b) decreased elasticity of stomach c) capacity to resist damage decreases d) food remains in stomach for less time