Evolution in Present Times (Grade 12 NSC Matric Life Sciences): Flashcards
📚Flashcards
Practise the cards
10 cards from this deck
ShowHide
Practise the cards
10 cards from this deck
Nature of evolution (continuous or intermittent)
Nature of evolution (continuous or intermittent)
Continuous process
Organisms showing rapid observable evolution
Organisms showing rapid observable evolution
Pathogens (bacteria and viruses)
Bacterium causing tuberculosis (TB)
Bacterium causing tuberculosis (TB)
Mycobacterium tuberculosis
Bacterial population composition before antibiotic treatment
Bacterial population composition before antibiotic treatment
Mixture of normal and naturally resistant bacteria
Effect of antibiotics on normal vs resistant bacteria
Effect of antibiotics on normal vs resistant bacteria
Normal bacteria die; resistant bacteria survive
Outcome after resistant bacteria survive antibiotic treatment
Outcome after resistant bacteria survive antibiotic treatment
They multiply rapidly and become dominant population
Process transferring resistance genes between bacteria
Process transferring resistance genes between bacteria
Horizontal gene transfer
Result of incomplete antibiotic treatment
Result of incomplete antibiotic treatment
Resistant bacteria survive and reproduce
TB resistant to multiple drugs
TB resistant to multiple drugs
Multi-drug resistant (MDR) TB
Number of drugs used to treat MDR TB
Number of drugs used to treat MDR TB
Five different drugs