Analyze the diagram below. Which of the following is true according to the diagram?

A. Reaction Y Requires more activation energy

B. Reaction X produce more products

C. Reaction X occurred with an enzyme

D. Reaction Y occurred using a catalyst

The gene that causes sickle-cell disease is present in a higher percentage of residents of sub-saharan africa than among those of african descent living in the united states. even though this gene causes sickle-cell disease, it also provides some protection from malaria, a serious disease that is widespread in sub-saharan africa but absent in the united states. discuss an evolutionary process that could account for the different percentages of the sickle-cell gene among residents of the two regions.

The theories on the expansion of galaxies maybe re-examined to strengthen science should not be tested to strengthen science will weaken scientific knowledge if they change will become laws if they don't change

What percentage of light hits earth's surface directly?