subject
Biology, 12.12.2020 15:50 QueenNerdy889

Penicillin was the first antibiotic introduced during World War II. Today, many bacteria are resistant to antibiotics. Which statement explains the appearance of these resistant varieties? Group of answer choices

A. Penicillin shared DNA with bacteria to produce resistant strains.

B. Penicillin became less concentrated over the last few decades.

C, Penicillin killed most of the bacteria but left the resistant bacteria to reproduce.

D, Penicillin causes bacteria to reproduce more quickly to maintain a consistent population.

ansver
Answers: 2

Another question on Biology

question
Biology, 22.06.2019 01:30
15 ! come and answer! a(n) disease is caused by a pathogen and can spread among organisms. a infectious b noninfectious c toxic d contaminated
Answers: 1
question
Biology, 22.06.2019 05:30
Plants consume most of their carbon from a. the soil b. the water c. the roots d. the air
Answers: 2
question
Biology, 22.06.2019 11:20
Which of the following is a limitation of a clinical trial? a.)amount of random assignments b.)hospital cost c.)number of test tubes d.)amount of peer review
Answers: 1
question
Biology, 22.06.2019 11:30
Which of the following statements is true about the relationship between genetic variation and natural selection? a. genetic variation must be present in a population before natural selection can act on it. b. genetic variation arises in a population as a result of natural selection. c. natural selection can act on a population whether there is genetic variation within the population or not. d. after natural selection acts on a population, the amount of genetic variation in the population always increases.
Answers: 1
You know the right answer?
Penicillin was the first antibiotic introduced during World War II. Today, many bacteria are resista...
Questions
question
Mathematics, 28.07.2019 11:00
Questions on the website: 13722363