Es una fuerza que se manifiesta cuando dos superficies en contacto se deslizan una sobre la otra y siempre se opone al movimiento

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

Diagram of the evolution of land plants?

When a doggo starts to pace around in the same line for a hand full of days. what would that mean?