Your answer would be B ,C is incorrect because then he would get different answer D does not matter it would be the same A it would take longer and it basically the same as the measuring tape but B that would get you better answers that are more accurate because then you would have backups in case you mess up one. Hope that helps
Answer: The newly built strands are not complementary to the original strands.
Explanation:
He brought back galapagos turtles and finches
The ozone layers helps to sustain terrestrial life by absorbing the incoming UV radiation, maintaining the Earth's temperature structure, and keeping the ozone in the troposphere low. All of the choices given are correct.