extinction and evidence

• What are fossils?


  Fossils are the remains or traces of organisms from millions of years ago.
• How do fossils provide evidence for evolution?


  They show how life has changed over time.
• What are the types of fossils?

  • Parts of organisms that didn’t decay
  • Mineralized remains where parts are replaced by minerals
  • Traces like footprints or burrows
• Why is the fossil record considered incomplete?


  Many early life forms were soft-bodied, leaving few traces, and some fossils have been destroyed by geological processes.
• What is antibiotic resistance?


  Antibiotic resistance is when bacteria evolve rapidly and develop mutations that allow them to survive antibiotics.
• What is an example of antibiotic-resistant bacteria?


  MRSA is an example of antibiotic-resistant bacteria.
• How does evolutionary theory relate to antibiotic resistance?


  It explains the spread of antibiotic-resistant strains, supporting the concept of evolution.
• What is extinction?


  Extinction occurs when all individuals of a species die out.
• What are the factors contributing to extinction?


  • Environmental changes
  • New predators or diseases
  • Competition for resources
  • Catastrophic events