Design an experiment to test substances X, Y, and Z to determine which one is a catalyst for the reaction

Hummingbirds drink nectar from flowers, while robins eat plant seeds. what does this reduce?

Which was most likely an effect on society that resulted from improvements in blood handling during world war i and world war ii?

Casts and mold are a type of preservation where the original material decays, leaving a mold in surrounding rock that can be filled with another sediment a. true b. false