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1. Review - What are the themes in biology that come up again and again

1. Review - What are the themes in biology that come up again and again Predict - Suppose you discover a new organism. What would you expect to see if you studied it under a microscope 2. Review - At what levels do biologists study life

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1. Review - What are the themes in biology that come up again and again

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  1. 1. Review- What are the themes in biology that come up again and again Predict- Suppose you discover a new organism. What would you expect to see if you studied it under a microscope 2. Review- At what levels do biologists study life Classify- A researcher studies why frogs are disappearing in the wild. What field of biology does the research fall 3. Practice- In an experiment, you need 250 grams of potting soil for each of 10 plant samples. How many kilograms of soil in total do you need?

  2. Science of Biology 1.3 Studying Life

  3. Think about important news stories you’ve heard. Bird flu spreads around the world, killing birds and threatening a human epidemic. Users of certain illegal drugs experience permanent damage to their brains and nervous systems. Reports surface about efforts to clone human cells. • These and many other stories involve biology—the science that employs scientific methodology to study living things. The Greek word bios means “life,” and -logy means “study of.”

  4. Characteristics of Living Things • What characteristics do all living things share • No single characteristic is enough to describe a living thing • Some things, such as viruses, exist at the border between organisms and nonliving things.

  5. 9 Characteristics of Living Things • A universal genetic code • DNA.

  6. 9 Characteristics of Living Things • Grow and develop • Single fertilized egg divides again and again • They differentiate, which means they perform different functions.

  7. 9 Characteristics of Living Things • Respond to their environment • Stimulus: signal to which an organism responds.

  8. 9 Characteristics of Living Things • Reproduce • Most plants and animals engage in sexual reproduction • Cells from two parents unite to form the first cell of a new organism • Asexual reproduction • Single organism produces offspring identical to itself.

  9. 9 Characteristics of Living Things • Maintain homeostasis • Relatively stable internal environment.

  10. 9 Characteristics of Living Things • Metabolism • Obtain and use material and energy to grow, develop, and reproduce.

  11. 9 Characteristics of Living Things • Made up of one or more cells • Cells can grow, respond to their surroundings, and reproduce • Cells are complex and highly organized.

  12. 9 Characteristics of Living Things • Groups of organisms evolve.

  13. Big Ideas in Biology • Cellular basis of life • Information and heredity • Matter and energy • Growth, development, and reproduction • Homeostasis • Evolution • Structure and function • Unity and diversity of life • Interdependence in nature • Science as a way of knowing.

  14. Fields of Biology • Global Ecology • Biotechnology • Building the Tree of Life • Ecology and Evolution of Infectious Diseases • Genomics and Molecular Biology

  15. Scientists use the metric system when collecting data and performing experiments. Scientific Measurement

  16. Scientific Measurement • 1 kilometer = ___ meters • .45 liters = ___milliliters • 5000 milligrams = ___grams • 130 meters = ___ kilometers • 2500 milliliters = ___liters • .017 grams = ___milligrams

  17. Scientific Measurement • 1 kilometer = 1000 meters • .45 liters = ___milliliters • 5000 milligrams = ___grams • 130 meters = ___ kilometers • 2500 milliliters = ___liters • .017 grams = ___milligrams

  18. Scientific Measurement • 1 kilometer = 1000 meters • .45 liters = 450 milliliters • 5000 milligrams = ___grams • 130 meters = ___ kilometers • 2500 milliliters = ___liters • .017 grams = ___milligrams

  19. Scientific Measurement • 1 kilometer = 1000 meters • .45 liters = 450 milliliters • 5000 milligrams = 5 grams • 130 meters = ___ kilometers • 2500 milliliters = ___liters • .017 grams = ___milligrams

  20. Scientific Measurement • 1 kilometer = 1000 meters • .45 liters = 450 milliliters • 5000 milligrams = 5 grams • 130 meters = .13 kilometers • 2500 milliliters = ___liters • .017 grams = ___milligrams

  21. Scientific Measurement • 1 kilometer = 1000 meters • .45 liters = 450 milliliters • 5000 milligrams = 5 grams • 130 meters = .13 kilometers • 2500 milliliters = 2.5 liters • .017 grams = ___milligrams

  22. Scientific Measurement • 1 kilometer = 1000 meters • .45 liters = 450 milliliters • 5000 milligrams = 5 grams • 130 meters = .13 kilometers • 2500 milliliters = 2.5 liters • .017 grams = 17 milligrams

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