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Everyone is a Biologist ! PowerPoint Presentation
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Everyone is a Biologist !

Everyone is a Biologist !

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Everyone is a Biologist !

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Presentation Transcript

  1. Everyone is a Biologist !

  2. Chapter 1 The Science of Biology?

  3. Chapter 1 The Science of Biology?

  4. Three Questions What are the Characteristics of Life? How diverse is life? How do we study the natural world?

  5. MULTICELLULAR ORGANISM ORGAN SYSTEM ORGAN TISSUE CELL ORGANELLE MOLECULE ATOM Largest Levels of Organization Smallest

  6. Levels of Organization

  7. All living things share the following characteristics in combination. What are the Characteristics of Life?

  8. Organization - Made of cells Reproduce Based on universal genetic code Grow and develop Obtain and use materials and energy Respond to their environment Maintain a stable internal environment – homeostasis Change over time - evolve What are the Characteristics of Life?

  9. What are the Characteristics of Life? Made of Cells • Prokaryote –simple small cell, no nucleus, DNA floats free • Eukaryote – larger complex cell, DNA stored in the nucleus

  10. Reproduction, Growth & Development Asexual reproduction - involves a single parent; offspring are genetically identical to the parent. Sexual reproduction - involves 2 parents; offspring are genetically diverse. Is it essential for an individual to reproduce? What are the Characteristics of Life?

  11. Based on a universal genetic code DNA – molecule of complex information What are the Characteristics of Life?

  12. What are the Characteristics of Life? Growth And Development

  13. Chapter 1 What is Life? Obtain and use Material and Energy Metabolism- biochemical reactions that acquire & use energy. Why do organisms need energy? How do organisms obtain energy? What are the Characteristics of Life?

  14. Response & Adaptation Irritability - immediate response to a stimulus. Stimulus – a signal to which an organism responds. What are the Characteristics of Life?

  15. Irritability & Adaptation Adaptation - an inherited behavior or characteristic that enables an organism to survive & reproduce. What are the Characteristics of Life? Over time, adaptations are modified bynatural selection.

  16. Maintain a stable internal environment Homeostasis - the ability of an organism to maintain its internal environment despite conditions in the external environment. Human body temperature is……… • if body temperature rises, you sweat. • if body temperature lowers, you shiver. What are the Characteristics of Life?

  17. Life is always changing….. On the level of DNA…… Change = Evolution What are the Characteristics of Life? Evolution is the backbone of biology.

  18. A Short Quiz: 1. What are the characteristics of life? 2. What is homeostasis? What is an example of homeostasis? 3. Is a computer living? Why or why not? Is a virus living? What are the Characteristics of Life? 4. Why is energy required by living things?

  19. Biodiversity refers to the many different types of organisms on earth. Taxonomy is the biological science that classifies life according to evolutionary relationships. Life is Diverse The Domain is the largest group of organisms.

  20. Life is Diverse

  21. Chapter 1 What is Life? Kingdom Phylum Class Order Family Genus Species Life is Diverse Kids Pick Candy Over Fancy Green Salads