1. Biology in the 21 st Century

2. What is Science? Science is understanding how the natural world works by observing physical evidence.

3. What is not Science? Pseudoscience - False science Pseudoscience - False science Dowsing Rods Dowsing Rods Reflexology Reflexology Astrology Astrology Miracle cures Miracle cures Needle/washers Needle/washers

4. Reflexology

5. What is Biology? The study of life science The study of life science Kingdoms of Life Kingdoms of Life Animals Animals Plants Plants Bacteria Bacteria Fungi Fungi Protists Protists What other fields of What other fields of biology are there?

6. Largest vs. Smallest Animals

7. Plants

8. Fungus

9. Protist

10. Bacteria

11. Characteristics of Life All organisms share certain characteristics. All organisms share certain characteristics.

12. Characteristics of Life WHAT ARE THE 4 MAJOR CHARACTERISTICS? WHAT ARE THE 4 MAJOR CHARACTERISTICS? Exchange nutrients Exchange nutrients Water Water Exchange gases Exchange gases Die or end processes Die or end processes Respond to stimuli Respond to stimuli Grow or mature Grow or mature Birth or born Birth or born Movement Movement Communication Communication Reproduction Reproduction

13. Structure is related to Function Structures are parts of an organism Structures are parts of an organism Functions are the way the parts work Functions are the way the parts work Does heart muscle have the same structure as arm muscle? Does heart muscle have the same structure as arm muscle?

14. Levels of Biological Organization Atom Atom Molecule Molecule Macromolecule Macromolecule Organelles Organelles Cell Cell Tissues Tissues Organs Organs Organ Systems Organ Systems Organisms Organisms Populations Populations Community Community Ecosystem Ecosystem Biome Biome Biosphere Biosphere

15. Biologists’ Tools and Technology Imaging technologies provide new views of life Imaging technologies provide new views of life

16. Light Microscope Magnify up to 400x (classroom scopes) Magnify up to 400x (classroom scopes) Living or preserved specimens Living or preserved specimens Good for viewing cells and bacteria Good for viewing cells and bacteria

17. Scanning Electron Microscope Magnify up to 1500x Magnify up to 1500x Specimen must be preserved Specimen must be preserved Surface features visible Surface features visible

18. Transmission Electron Microscope Magnify up to 5000x Magnify up to 5000x Specimen must be preserved as a SLICE Specimen must be preserved as a SLICE Sees through the specimen for details Sees through the specimen for details

19. Medical Imaging X-rays X-rays MRI – Magnetic Resonance Imaging MRI – Magnetic Resonance Imaging Living specimens = PEOPLE Living specimens = PEOPLE

20. ? What are some different types of cells that can be observed with a light microscope? What are some different types of cells that can be observed with a light microscope? Are they unicellular organisms or part of a multicellular organism? How can you tell? Are they unicellular organisms or part of a multicellular organism? How can you tell? Are they prokaryotes or eukaryotes? Are they prokaryotes or eukaryotes? Bacteria or other cells Bacteria or other cells Simple or complex Simple or complex