Which statement accurately describes an enzyme? An enzyme is used only once and increases the rate of a chemical reaction by raising the activation energy.
O An enzyme is used only once and increases the rate of a chemical reaction by lowering the activation energy.
An enzyme is reusable and increases the rate of a chemical reaction by raising the activation energy.
An enzyme is reusable and increases the rate of a chemical reaction by lowering the activation energy.

The theories on the expansion of galaxies maybe re-examined to strengthen science should not be tested to strengthen science will weaken scientific knowledge if they change will become laws if they don't change

Actinobacteria sp. are fermenting organisms (which do you use oxygen to breathe) referred to as chemoorganohetereotrophs this means they break down organic material and convert it to inorganic material. which part of the carbon cycle does this describe

Diego conducted an experiment to find out what kind of ball bounces the highest when dropped from a five-foot platform. he used a golf ball, a tennis ball, and a soccer ball. he dropped each ball from the balcony once. diego recorded his observations after each drop. what can diego do to best improve the reliability of his results? a) drop each ball from the platform three more times b) record his observations in more than one unit c) write at least two scientific questions after the experiment is complete d) share his results with other people who have done similar experiments you for the !