Through expanding, some galaxies are on a collision course with us.
Answer:
A and C
Explanation:
A. because when we humans are burning maybe our refuse or garbage it will go up to the ozone layer causing air and then it will then result to carbon dioxide.
It is a that is what I think
In biochemistry, two biopolymers are antiparallel if<span> they run </span>parallel<span> to each other but with opposite alignments. An example is the two complementary strands of a </span>DNA<span>double helix, which run in opposite directions alongside each other.</span>
