Which of the following statements about passive transport is true? Choose 1 Choose 1 (Choice A) A Passive transport refers only to the movement of water. (Choice B) B Energy input is required. (Choice C) C Substances move along their concentration gradients. (Choice D) D Membrane proteins are always needed.

if the type of the food available changes, then the frequency of beak types will change, because birds with beaks more suited to the available food will be more successful over time.

true                                                                                                       true true true true true true

answercoenzymes;