A(n) force creates something while a(n) force destroys something. a. internal; external b. external; internal c. constructive; destructive d. destructive; constructive

complete the square on the right side of the equation;

-5(x + 0)^2 + 15

answer: d. y = -x^2 + 15

stimulus is a change in the environment that causes an organism to react. the response is the reaction to the stimulus. some examples of stimuli for zebras are drought, to many predators, and bad feeding grounds such as dead grass or plants. zebras respond to stimuli just like all other living organisms

1. is geographic distribution

2 is increasing complexity

3 is transitional forms