Lactose intolerance can be the result of extreme pH changes in the intestines, which cases lactase to no longer function. What has happened
to lactase if this occurs? *

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

Where do the respiratory and circulatory systems meet? a. in the heart b. in the muscles c. in the lungs d. in the brain

What is turgor pressure, what causes it, and what does it do for a plant?