Answer:
C-None of these are found in an observational study
Explanation:
(A.) controlled variables are a part of what's found in a controlled experiment. (B.) manipulated variables are a part of what's found in a controlled experiment. (C.) Answer choice A. or Controlled variables, Answer choice B. or Manipulated variables, and Answer choice D. or Control groups are a part of what's found in a controlled experiment. (D.) Control groups are a part of what's found in a controlled experiment. Therefor this only leaves one answer and that answer is Like I said C-None of these are found in an observational study.
Answer: Sulfa antibiotics target a specific enzyme that inhibits bacterial growth. ... Viruses are unaffected by antibiotics because they do not have peptidoglycan cell walls or ribosomes, and they do not replicate their own DNA. Bacteria can become resistant to antibiotics through the process of selection and evolution.
Explanation:
<span>In general, most dna viruses multiply in the host cell's NUCLEUS, while most rna viruses multiply in the host cell's CYTOPLASM. </span>
There will always be one stronger species that take over, which is what evolution has taught us.
I believe the answer would be D. <span>Only one will survive.
Have a good day!</span>
