I've seen this question before, I think you have incorrect choices
The correct answer is: DNA polymerase pairingnew As with Gs.
not Cs with Gs .
The answer is food chain.
Answer:
A traditional technology is technical
advances upon which something else is
added to expand it . For example,
farmers have been using powered plows
since the steam engine. However,
modern technologies have built upon
the basic structures, purposes, and
functioning of the plow.