Answer:
This experiment proved that DNA replicated semiconservatively; half the original polynucleotide is conserved in each of the two copies
Explanation:
Semi-conservative mode of replication means that the two strands of DNA unwind from each other, and each of themacts as a template for synthesis of a new, complementary strand. As a result, two formed DNA moleculesc ontain one original strand and one new strand.
Meselson and Stahl experiment showed this model by labeling the DNA of bacteria across generations using isotopes of nitrogen ( patterns of DNA labeling showed the mode of replication).
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-The mutation could make it easier for an organism to obtain food.
-yes, a correct anwer!
-The mutation could make an organism need more food.
-no, this would make it harder for the organism to survive
-The mutation could improve the organism's sight.
-yes! better sight means more information, which is beneficial
- The mutation could let the organism run faster.
-running faster means advantage over pray and predator - also a correct answer
so all are correct except on the second one.
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FIBRE B
is the answer
becausee
it is
Speciation is not a mechanism of microevolution.
Answer:
B. it's trying to get sunlight.
(D. is plausible too)
Explanation:
Plants need sunlight for photosynthesis, so they tend to act towards the sunlight (phototropism)