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

Twin boys have girlfriends one of the couples have a baby would the dna of the lil baby be the same as the couples dna bc the boys are identical twins

Which of the following is the source of energy for photosynthesis? a.) glucose b.) chlorophyll c.) carbon dioxide d.) sunlight

What is responsible for the uneven heating between the poles and the equator on any given day