What is a enzyme speeds up a chemical reaction by lowering the barrier?

Parasitism could be considered a form of which of these types of relationships? -mutualism -commensalism -predator-prey -mimicry

Which represents the cross between parent plants if one is heterozygous for yellow-colored pods and the other is homozygous for green-colored pods? yy  ´    ´    ´    ´  yy

Do you think the gene eef1 alpha1 supports cell theory? explain your response.