A frog jumps up at time t = 0. Which of the following graphs best shows the velocity u
of the frog from when it jumps until it reaches its highest
point?
Assume upward is the positive direction.

28. evolution

29. environment, survive, offspring  

explanation:

the skeletons of most mammals reach a certain size and then stop growing. however, many animals, including some mammals, keep growing throughout their lives. kangaroos, for example, just keep growing and growing until they die. also, the longer an animal lives the greater the chance it might catch some deadly disease.