(Question)
Q: The peripheral nervous system has major nerves that travel through every part of the body except which two places? Choices: - muscles and brain - lungs and spinal cord - brain and heart - brain and spinal cord A:
(Answer)
brain and spinal cord

(Question)
Q: What chemical substances are secreted by animals that communicate by odor or taste? Choices: - alaki - hormones - acids - pheromones A:
(Answer)
pheromones

(Question)
Q: Chemical changes occur because of what? Choices: - liquid reactions - evaporation - toxic reactions - chemical reactions A:
(Answer)
chemical reactions