Answer: A
Explanation: There is no need to conduct and experiment if you already know the answer
D is the answer to this question hope it helps
This is true I looked up in the science dictionary.
Answer:
Option D
Explanation:
Bits of DNA that are interspersed among these repeated sequences are called spacers. Regarding to bacteria, the spacers are taken from viruses that previously attacked the organism. They serve as a bank of memories, which enables bacteria to recognize the viruses and fight against future attacks.