Which statement about reaction rates is true? changing the amount of reactants will not change the reaction rate. changing the temperature cannot speed up a reaction rate. changing the surface area affects the reaction rate. a catalyst slows down the reaction rate.

During a fierce storm a large number of tall trees on an island are uprooted by the wind and die. most of the trees on the island are now short trees and produce seeds that grow into short trees. what concept is shown in this example? question 5 options: natural selection artificial selection genetic engineering gene splicing