Bio test rev:

• What are fossils?

  Remains of ancient plants and animals
• What are the three main ways fossils can form?

  1. Gradual replacement by minerals
  2. Casts and impressions
  3. Preservation in low-decay environments
• How do fossils show changes in living things?

  They provide evidence of evolutionary changes
• What is the primary way fossils form?

  Gradual replacement by minerals
• What happens to hard parts of organisms during fossilization?

  They slowly turn into minerals
• What materials can form casts of organisms?

  Soft materials like clay
• How do impressions of footprints form?

  When soft material hardens around them
• What is amber made from?

  Fossilized resin
• Why do low-oxygen environments help preserve fossils?

  They prevent decay microbes from surviving
• What is a notable example of a well-preserved fossil?

  Pikaia gracilens found in a bog
• What do fossils indicate about the history of life on Earth?

  They show how organisms have evolved
• What is one hypothesis about the origin of life?

  Life began in a primordial soup
• Why can't hypotheses about the origin of life be conclusively supported?

  There is insufficient evidence available
• What geological activity can destroy fossils?

  Movement of tectonic plates
• What is the significance of studying fossils?

  They provide insights into evolutionary history
• What are the key concepts related to antibiotic-resistant bacteria?

  • Bacteria can evolve and become resistant
  • Classification systems change over time
  • Antibiotic resistance is becoming more common
  • Organisms are named using the binomial system
• What is the binomial system used for?

  Naming organisms scientifically
• What do phylogenetic trees illustrate?

  Evolutionary relationships among organisms
• What is a common issue with antibiotic resistance?

  It is becoming more common
• How does mutation relate to evolution?

  Mutations can lead to new traits