Answer:
The law of conservation of mass
Explanation:
Connect the brain and the spine and spinal nerves and such
Answer:
The sympathetic nervous system is involved in preparing the body for stress related activities; the parasympathetic nervous system is associated with returning the body to routine, day-to-day operations. The two systems have complementary functions, operating in tandem to maintain the body's homeostasis.
Not necessarily the food chain may change for some animals because they eat that one species
