The net movement of uncharged, polar molecules across a semipermeable membrane from a low concentration to a high concentration occurs by diffusion
(a) true
(b) false

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.

Construct at least two possible hypotheses for the student’s experiment.

Nucleoplasmin is a nuclear protein. this protein was divided into two segments and linked to the same large cytoplasmic protein. what is the name of that large cytoplasmic protein