Classify the following according to whether they describe a cell in a a
A. Hypertonic B. hypotonic C. Isotonic solution.
Lysis of an animal cell.
Plant cell has no net movement of water.
Crenating animal cell.
Animal cell has no net movement of water.

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.

Explain how the number of similarities between the embryos from early stage to late stage is used as evidence of a common ancestry

The image below shows a common blood pressure gauge. what does this device do? a. measures the level of oxygen present in the blood b. measures the pressure of blood when the lungs expand and compress c. measures the electrical activity of the heart d. measures the pressure of blood when the heart contracts and relaxes