The final electron acceptor during aerobic cellular respiration is

Five dialysis bags, constructed from a semi-permeable membrane that is impermeable to sucrose but permeable to water, were filled with various concentrations of sucrose and then placed in separate beakers containing an initial concentration of 0.6 Msucrose solution. At 10-minute intervals, the bags were weighed and the percent change in mass (compared to the starting weight) of each bag was graphed. For which line or lines does the data indicate that the solution in the bag was hypotonic compared to the solution in the beaker at both the beginning and the end of the experiment?

Which of these processes DIRECTLY produces the greatest amount of ATP in human cells? (That means just the ATP produced in this process itself).

Bleach has a pH of 12; borax has a pH of 9.  Bleach is:

Disruptive selection, where there is selection against hybrids, can genetically split a population in the same geographic location into two or more species.  This process of speciation is called:

The __________ period is often called the Age of Amphibians due to the diversification and dominance of that group during this time, but it was also when the plants that formed most of the known major coal deposits lived.

Refer to the representation of DNA replication above.  The structure labeled “D” is:

The rate of cystic fibrosis among Caucasian-American births is about 1 in 2,500.  If the Caucasian-American population is in genetic equilibrium (Hardy-Weinberg equilibrium) for the gene involved in cystic fibrosis, then the frequency of Caucasian-Americans who are carriers (heterozygous) for cystic fibrosis is approximately:

The main source of molecular oxygen (O2) in Earth’s atmosphere is:

The atomic mass of the atom depicted in the above figure is ___ .