Eukaryotic cells of humans and animals possess a selective advantage in the fact that they are capable of both aerobic and anaerobic cellular respiration.
Consider the following statements:
1) Anaerobic respiration allows glycolysis to continue
II) Anaerobic respiration generates more ATP per molecule of glucose
III) Anaerobic respiration regenerates NAD+
IV) Anaerobic respiration prevents the build-up of excess oxygen in the mitochondria
V) Anaerobic respiration results in the removal of a molecule of carbon dioxide per molecule of pyruvate.
Which of the statements best reflects this selective advantage?

A) I and II
B) I and III
C) II and IV
D) I, III, and V
E) II, III, and IV

The kidney filters potentially toxic substances in the blood, and thus “clears” the blood of those substances. this clearance function is dependent upon and proportional to the diffusion gradient of the substance across filtering capillaries, i.e. if the concentration of the substance is doubled, twice as much will be cleared from each ml of blood that is filtered. suppose that the body produces a constant amount of a substance x per unit of time. the kidneys eliminate substance x at a rate directly proportional to the concentration of the substance and the volume of blood cleared each minute (c): elimination = c × [x], where [x] is the steady-state concentration of substance x. imagine an individual with an initial concentration of x equal to [x]0 who develops kidney disease. her baseline clearance c0 drops to one half of the original (½c0). what is the new steady state concentration of x? (for simplicity, assume that substance x is 100% filtered by the kidney).

Where does the information about where each transcription factor binds originate?

Natural resources are any materials that humans obtain from the earth to meet our wants and needs.