This deep dive covers Example: Antibiotic Resistance within Evolution for GCSE Biology. Theory of evolution, natural selection, and evidence for evolution It is section 4 of 15 in this topic. Use this deep dive to connect the idea to the wider topic before moving on to questions and flashcards.
Example: Antibiotic Resistance
- Random mutation gives some bacteria resistance to antibiotic
- Antibiotic kills non-resistant bacteria
- Resistant bacteria survive and reproduce
- They pass on resistance allele to offspring
- Eventually, most of population is resistant
- The antibiotic no longer works
Example: MRSA — "superbug" resistant to many antibiotics
Practice questions for Evolution
What is evolution?
Describe three pieces of evidence that support Darwin's theory of evolution.
Quick recall flashcards
What did Charles Darwin propose and when?
In 1859, Darwin published 'On the Origin of Species', proposing that all species evolve through natural selection. Individuals with advantageous characteristics are more likely to survive, reproduce, and pass on those traits to offspring.
What is evolution?
The gradual change in the inherited characteristics of a population over many generations through the process of natural selection. It can lead to new species forming over very long time periods.