This species existed between 2.7 and 2.3 mya and is characterized by having extreme prognathism?

What's the waste product of electrons and pyruvate combining in fermentation?  

Hydroelectric uses moving water to do work such as grinding grains in a mill true or false

Internal feedback works to maintain homeostasis when your a. heart rate decreases as your white blood cells increase b. breathing rate decreases as your red blood cells decrease c. heart rate increases as your liver is cleaning blood d. breathing rate increases as your heart rate increases