Answer:
DNA is double stranded, and the strands are antiparallel because they run in opposite directions.
Explanation:
Each DNA molecule has two strands of nucleotides. Each strand has sugar phosphate backbone, but the orientation of the sugar molecule is opposite in the two strands.
One reason i could have a negative affect is that the wildlife there would have no chance to relocate. Another is that it could cause a shortage in food for the prey type animals thinning their population witch in turn would kill off predatory animals and would through the whole ecosystem off balance. Hope it helps :).
Your answer is the second one geologic dating