Which is the best explanation of how catalysts are used in chemical reactions? A. Catalysts are need for every chemical reaction to get started

B. Each catalysts can only be used once we are given the chemical equation

C. Catalysts lower the activation energy for chemical reaction to start

D. Each catalysts see I can find with a few different substrates to get chemical reactions to started faster

The table below shows data for a population of fish in a pond. fish body color # of fins scales? tail shape a silver 4 yes fan b pink 4 yes flat c black 4 yes fan d orange 4 yes flat e orange 4 yes fan f silver 4 yes flat which of the above characteristics would be most in developing a classification system for the fish? a. body color and tail shape b. presence of scales and tail shape c. body color and number of fins d. number of fins and presence of scales

Viruses such as hiv reproduce rapidly. what is the connection between reproduction rate and evolution?

Does health insurance system in the us affect the work of health scientists? why or why not?