Natural Selection in Action (OCR A-Level Biology A): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
How many descendants can one resistant bacterium produce in 24 hours under optimal conditions?
How many descendants can one resistant bacterium produce in 24 hours under optimal conditions?
10,000 million
What are the two main routes by which bacteria acquire antibiotic resistance?
What are the two main routes by which bacteria acquire antibiotic resistance?
Mutation & plasmid transfer
Which mechanism of resistance involves penicillinase?
Which mechanism of resistance involves penicillinase?
Enzymatic breakdown
Why do mutations have an immediate effect on a bacterium's phenotype?
Why do mutations have an immediate effect on a bacterium's phenotype?
Bacteria are haploid organisms
What happens if patients stop taking antibiotics when they start feeling better?
What happens if patients stop taking antibiotics when they start feeling better?
Less susceptible bacteria may survive
Which strategy helps reduce antibiotic resistance?
Which strategy helps reduce antibiotic resistance?
Rotate antibiotics used
What is monoculture?
What is monoculture?
Growing a single crop over large areas
How should farmers apply pesticides to delay resistance evolution?
How should farmers apply pesticides to delay resistance evolution?
Monitor crops & apply when necessary
What is a selective agent?
What is a selective agent?
A factor influencing survival & reproduction
How does penicillinase protect bacteria from penicillin?
How does penicillinase protect bacteria from penicillin?
Cleaves penicillin molecules