HELP FAST 6.All living cells have a mechanism for DNA synthesis (replication), similar to the one shown in the image above. This process is important because
A. it results in the formation of identical sister chromatids, allowing cells to pass genetic information
to newly formed cells.
B. it results in the formation of similar homologous chromosomes, each containing alleles which
affect the phenotype of the organism.
C. it results in the formation of unique gametes, passing genetic information to sex cells and creating
genetic diversity within a population.
D. it results in the separation of antiparallel complementary DNA strands, allowing nuclear division to occur during mitosis.

On a backpacking trip, kenny hikes all day at a steady pace, covering 30 kilometers and burning 4000 calories. at the school track, janelle runs the 100-meter sprint in 13.5 seconds, burning 10 calories. afterward, janelle’s leg muscles are aching and she is breathing hard, while kenny maintains normal breathing all day, even though he burns 400 times more calories than janelle. which two statements offer the best explanation for this phenomenon? a. if the aerobic pathway—cellular respiration—cannot meet the energy demand, then the anaerobic pathway—lactic acid fermentation—starts up, resulting in lactic acid buildup and "oxygen debt." b. aerobic cellular respiration produces more energy, but its use is limited because of lactic acid buildup in the muscles and the resulting "oxygen debt." c. after about 90 seconds of intense exercise, the muscles become depleted of oxygen, and anaerobic respiration can no longer function to produce atp, resulting in "oxygen debt." d. the rate of energy demand determines how the muscles will obtain energy, either from cellular respiration or from lactic acid fermentation if not enough oxygen is present.