True or renewable resources have disadvantages. if so what are the disadvantages?

Different isotopes indicate that an element will have different numbers of

1. list three scientific reasons cockroaches may fly.

Which statement is true about a catalyst? a: a catalyst decreases the rate of the reaction. b. a catalyst is consumed during a chemical reaction. c. a catalyst lowers the activation energy of a reaction. d. a catalyst increases the reactant concentration during a reaction.