Answer:
Polymerase chain reaction, or PCR, is a technique to make many copies of a specific DNA region in vitro (in a test tube rather than an organism).
Answer:
C: Nitrogen
Explanation:
nitrogen is transparent to infrared light. the molecules are invisible because when you stretch one, it doesn't change the electric field.
Some you wouldn't see by stepping outside, but it gives you a general understanding of what you should be looking for.
Hope this helps!
a wildlife biologist who states that human expansion is destroying migration lands of birds
Widespread use of pesticide has lead to the development of:
More pesticide-resistant insects.