Strains of the bacterium Staphylococcus aureus have developed which are resistant to several types of antibiotic. Scientists have named these strains MRSA. These strains have developed as a result of...?

The answer is natural selection.  you have a colony of the bacterium and one bacterium develops a mutation which allows it to become resistant to some types of antibiotics. the bacteria that dont have the mutation get destroyed by the bacteria and those that do survive. This is an example of natural selection as it is basically the survival of the fittest. 

SS
Answered by Sai Sumathi P. Biology tutor

2370 Views

See similar Biology GCSE tutors

Related Biology GCSE answers

All answers ▸

In terms of ecological pyramids, how can pyramids of numbers sometimes be a different shape from pyramids of biomass, even for the same food chain?


Below is a diagram of a sperm cell. Describe how the long tail and mitochondria aid in the sperms function (2 marks)


Explain what an enzyme is and the lock and key hypothesis.


If the rate of photosynthesis is reduced, why is the rate of respiration also reduced?


We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

MyTutor is part of the IXL family of brands:

© 2025 by IXL Learning