In one paragraph, summarize how understanding macromolecules can help guide your decisions about nutrition and exercise.

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

Fungi are classified into how many groups? a. 1 group b. 2 groups c. 3 groups d. 4 groups

Ascientific idea becomes valid when it is what?