Question

the diagram shows the replication of dna in two successive generations.
upon observing the diagram, a student concludes that dna replication is semi-conservative in nature. which evidence supports the students conclusion?
○ the presence of an original dna strand in successive generations
○ the introduction of new types of dna strands in successive generations
○ the presence of four complementary dna sequences in the second generation
○ the exponential increase in the number of dna sequences in each generation

Explanation:

Semi-conservative DNA replication means each new DNA molecule is made of one original (parental) strand and one new complementary strand. The diagram shows original strands persist in successive generations, matching this model. Other options are incorrect: new DNA types do not form, the second generation has 2 hybrid (original+new) and 2 all-new molecules not 4 complementary sequences, and exponential increase alone does not prove semi-conservative replication.

Answer:

the presence of an original DNA strand in successive generations