Men can produce sperm throughout their adulthood (1pts)

Identify the type of energy used in each action. the flexing of an arm muscle: a signal transduction process by a neuron: a ball at the top of a hill: 1. electrical energy 2. mechanical energy 3. gravitational potential energy

The breakdown of food is accomplished by enzymes. a. physical b. chemical c. mechanical d. none of the above

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