Agroup of students decide to repeat the hershey and chase experiment with modifications. they decide to radioactively label the nitrogen in the dna, instead of the phosphate. they reasoned that each nucleotide contains more nitrogen than phosphate, so labeling the nitrogen will provide a stronger signal than labeling the phosphate. what is the flaw in this experimental design?

What are examples of the plant life and animal life that can be found in each type of terrarium

Cladistics is a way of classifying organisms by examining the characteristics of their ancestors and descendants and depicting the relationships in a cladogram. which of the following best describes a challenge in classifying organisms this way? a. there are millions of species on earth, and a cladogram is not a practical means for classifying all of them. b. it is impossible to tell which organisms are most closely related to each other using a cladogram. c. cladograms are detail-oriented and do not provide a useful understanding of evolutionary relationships. d. there is a limited number of ways to organize the information, so most cladograms end up looking very similar.

Which is the following can combine in a cell to convert a lower-energy molecule into a higher-energy molecule?