For a science fair project, two students decided to repeat the hershey and chase experiment, with modifications. they decided to label the nitrogen of the dna, rather than the phosphate. they reasoned that each nucleotide has only one phosphate and two to five nitrogens. thus, labeling the nitrogens would provide a stronger signal than labeling the phosphates. why won't this experiment work?

4.06 hc)a five-year review of threats to the southern resident orca population of the united states concluded that the top threats were prey availability, contaminants, and effects from recreational and whale watching vessels. further down the list are oil spills, disease, and effects from commercial vessels not targeting whales. how might this list be different if it were for transient whale populations, which have a larger average population size and live farther offshore in open waters? a)the transient population is more likely to be affected by contaminants. b)the transient population is less likely to be affected by whale watching vessels. c)the transient population is more likely to be affected by disease. d)the transient population is less likely to be affected by prey availability.

Acceleration is a direct result of a.) balanced forces b.) unbalanced forces c.) gravity d.) velocity hurry!

If animal agriculture was eliminated, how much grain would become available for human consumption?