I believe that it consists of about 3 billion letters/base pairs
Answer: biodiversity
Explanation: it makes sense as the best answer from all the choices, could be wrong tho lol
The subunits are called nucleotides
A buildup of pesticides could get into an animal. That animal will be killed by a hunter. The hunter eats the animal with the pesticide. The hunter then becomes sick. This is just an example but you can see what i'm getting at.
