5.
An enzyme produced by the pancreas in a
human body is most effective when it
functions in an environment that has a basic
pH. Why would the enzyme not function well
in an environment with a pH of 4?

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.

What causes the force that pushes magma from the magma chamber through the pipe and vent of a volcano?

Which zone within the open-ocean zone is home to the most organisms? deep zone surface zone intertidal zone transition zone