In the absence of oxygen, some organisms produce ethanol (alcohol) and atp from pyruvate and nadh. what is the name of this anaerobic pathway?
a. lactic acid fermentation
b. glycolysis
c. krebs cycle
d. alcohol fermentation

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 ancient whale fossils found in eqypt are believed to support the theory of evolution.

What do isotopes of uranium have the same number of? what do they have a different number of? a) same number of protons; different number of electrons b) same number of protons; different number of neutrons c) same number of electrons; different number of protons d) same number of neutrons; different number of protons