Describe the pros and cons of genetic engineering to modify food and in-vitro fertilization

answer; i believe its echoic memory,it is believed to last three to four seconds; good luck

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