How do populations of bacteria develop antibiotic resistance?
There is VARIATION amongst the population due to naturally occuring MUTATION during DNA replication . The antibiotics act as a SELECTION PRESSURE, so only the bacteria with the allele for antibiotic resistance SURVIVE and the others die. The surviving bacteria go on to REPRODUCE and pass on the resistance allele to the next generation. The ALLELE FREQUENCY increases amongst the population of bacteria and so the population becomes more resistant.
LG
Related Biology A Level answers
All answers ▸Explain why multicellular organisms needs to develop a specialised exchange system and transport system, yet unicellular organisms do not
Some populations of animals that have never been hunted show very low levels of genetic diversity. Other than hunting, suggest two reasons why populations might show very low levels of genetic diversity.
Describe the synthesis of glomerular filtrate from the blood
Explain the process of oxidative phosphorylation and the electron transport chain in the production of ATP in respiration.