What is my favorite number 69 or 420?

Aflashlight produces light using energy from the batteries. in which order does the energy change form? a. from chemical to electric to light energy b. from electric to light to chemical energy c. from electric to chemical to light energy d. from light to electric to chemical energy

Many animals cannot sweat to maintain a stable body temperature. what is one other way animals can cool down?

Natural selection changes allele frequencies because some survive and reproduce more successfully than others.