Amylase maltase, and lactase in the mouth digest carbohydrates. Trypsin and lipase in the stomach digest protein.
Crude density and ecological density are both related but different. Ecological density is the portion of land that a certain species can colonize, where as crude density is the land within the organism's range.
Answer: receive interpret, respond to stimuli
Explanation: sensory nerves receive stimuli, the brain interprets them and motor nerves respond
All choices excluding D would reduce carbon footprint