1) As a population approaches the carrying capacity for a certain environment, which of the following is predicted by the logistic equation? The population will go extinct The population growth rate will increase The population size will not change The carrying capacity of the environment will increase. 2) Which of the following is the major reason for the ascent (upward movement) of water in trees? negative pressure in the xylem cells pulls water upwards a metabolic pump in the roots pushes water upwards the evaporation of water occurring underground, at the tree’s roots, moves water upward the structure of phloem cells pulls water upwards 3) Which of these genetic processes was likely most responsible for the Cambrian explosion of diversity in organism morphology? point mutations gene duplication crossing over during meiosis sexual reproduction