In order to change from a solid to a liquid or a liquid to a gas, water must absorb a large amount of heat energy. Water can absorb a large amount of energy while producing only small changes in temperature because water has a
A.
low particle density.
B.
high particle density.
C.
high specific heat.
D.
low specific heat.

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 macromolecule is produced during translation? a. carbohydrate b. rna c. dna d. protein

Radiometric dating is used to tell the absolute age of materials by studying the decay rate of radioactive isotopes. the decay rates of isotopes are constant and are expressed as .