Scientists classify organisms into groups, usually with a dichotomous key. Using a dichotomous key is like solving a puzzle, one
in which you make choices about the organisms you are trying to classify. To classify this organism, you must complete the second tier of this dichotomous key. What would be the BEST choice for the second tier? A) size of body
B) insect or sea creature
C) six legs or eight legs
D) two body segments or three body segments
since the parasympathetic divison causes the heart rate to decrease and the sympathetic divison causes the heart rate to increase this is an example of antagonistic innervation
