Catalyst are unique because they speed up reactions and A. Are not used up in the reaction B. Are used up in the reaction C. Create buffers D. Create compound

The population of unionid mussels decreased after zebra mussels were introduced. zebra mussels competed with the unionid mussels for food. the zebra mussels were able to displace the unionid mussels, allowing the zebra mussel population to increase  over the years. the unionid mussel population decreased because  of lack of food.

Reducing agents  oxidized by the reaction