Identify three ways we use analog and digital signals in our everyday lives.

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

Apaleontologist finds a plant fossil that shows that the plant had seeds. what can the paleontologist conclude?

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