CHAPTER 1 Introduction Biology Today Power Point Lectures

CHAPTER 1 Introduction: Biology Today Power. Point® Lectures for Essential Biology, Third Edition – Neil Campbell, Jane Reece, and Eric Simon Essential Biology with Physiology, Second Edition – Neil Campbell, Jane Reece, and Eric Simon Lectures by Chris C. Romero Copyright © 2007 Pearson Education Inc. , publishing as Pearson Benjamin Cummings

Copyright © 2007 Pearson Education Inc. , publishing as Pearson Benjamin Cummings

• We are living in a golden age of biology. – Modern biology is as important as it is inspiring, with exciting breakthroughs changing our very culture. Copyright © 2007 Pearson Education Inc. , publishing as Pearson Benjamin Cummings

Figure 1. 1 Copyright © 2007 Pearson Education Inc. , publishing as Pearson Benjamin

So what is bio, bro? • Biology = the scientific (or measurable) study of

• The phenomenon we call life defies a simple, one-sentence definition. Copyright ©

WHAT IS LIFE? Copyright © 2007 Pearson Education Inc. , publishing as Pearson Benjamin

Response to the environment Regulation order 7 QUALITIES ALL LIFE MUST TO HAVE Growth and development reproduction Figure 1. 2 Energy utilization Copyright © 2007 Pearson Education Inc. , publishing as Pearson Benjamin Cummings evolution

Organization all living things are organized Copyright © 2007 Pearson Education Inc. , publishing

Response to environment Copyright © 2007 Pearson Education Inc. , publishing as Pearson Benjamin

Reproduction Produce offspring similar to self Sometimes can mix genetic information Copyright © 2007

Evolution Copyright © 2007 Pearson Education Inc. , publishing as Pearson Benjamin Cummings

Energy Use All living things require energy to do everything else • Repair cells

Growth and development Copyright © 2007 Pearson Education Inc. , publishing as Pearson Benjamin

Regulation Copyright © 2007 Pearson Education Inc. , publishing as Pearson Benjamin Cummings

This computer Is it / does it: ordered? YES respond to the environment YES reproduce? NO evolve? NO use energy? YES self-regulate? YES Copyright © 2007 Pearson Education Inc. , publishing as Pearson Benjamin Cummings

Are trees alive Is your dog alive Is fire alive Copyright © 2007 Pearson

Life at Its Many Levels • Biologists explore life at levels ranging from the biosphere to the molecules that make up cells. Copyright © 2007 Pearson Education Inc. , publishing as Pearson Benjamin Cummings

Country State County Town Block House Room of bricks Brick Copyright © 2007 Pearson

COMMUNITY Figure 1. 3 Copyright © 2007 Pearson Education Inc. , publishing as Pearson

The Metric System Power. Point® Lectures for Essential Biology, Third Edition – Neil Campbell, Jane Reece, and Eric Simon Essential Biology with Physiology, Second Edition – Neil Campbell, Jane Reece, and Eric Simon Lectures by Chris C. Romero Copyright © 2007 Pearson Education Inc. , publishing as Pearson Benjamin Cummings

“Systeme International” Base 10 System Works for all units of measurement • length, volume,

length, volume, time, mass The Standard or English System is what you are used to using in the US. Here’s some examples: Length = Inches, feet, or Miles Volume = Cups, ounces, gallons Time = Seconds Mass = Pounds Copyright © 2007 Pearson Education Inc. , publishing as Pearson Benjamin Cummings

length, volume, time, mass However, the Metric system is used for ALL sciences universally. Here’s some examples: Length = Meter (m) Volume = Liter (L) Time = Second (s) Mass = Gram (g) Copyright © 2007 Pearson Education Inc. , publishing as Pearson Benjamin Cummings

Easy to use Base 10 allows scientists to easily change units to make numbers more manageable • How many days old are you? • Easier to use years huh… Copyright © 2007 Pearson Education Inc. , publishing as Pearson Benjamin Cummings

pencil = _71. 0__mm or __7. 1__cm Copyright © 2007 Pearson Education Inc. ,

pencil = _54. 0__mm or __5. 4__cm Copyright © 2007 Pearson Education Inc. ,

pencil = _102. 0__mm or __10. 2__cm Copyright © 2007 Pearson Education Inc. ,

pencil = _8. 0__mm or __0. 8__cm Copyright © 2007 Pearson Education Inc. ,

Sometimes it becomes impractical to measure with cm or mm. . What about the big stuff? Well… 10 mm = 1 cm What can we do with 10 cm? • Think, think? LET’S CALL IT 1 (SOMETHING METER) Copyright © 2007 Pearson Education Inc. , publishing as Pearson Benjamin Cummings

kangaroos hop down mountains during cold months kilo- (k) hecto- (h) deka- (da) meter (m) meter(l) liter gram(g) D R U L n h o p e i t w g f t Copyright © 2007 Pearson Education Inc. , publishing as Pearson Benjamin Cummings deci- (d) centi- (c) milli- (m)

Fill in the boxes with the appropriate prefix and unit Kilo (k) hecto (h) deka (da) Meters (m) UNITS Liters (l) Grams (g) D R U L n h o p e i t w g f Copyright © 2007 Pearson Education Inc. , publishing as Pearson Benjamin Cummings deci (d) t centi (c) milli (m)

Examples: Q: 1. 2 h. L = _______ d. L • 3 steps down to the right A: = 1, 200. 0 d. L Q: 340. 2 cg = ____ kg • 5 steps up to the left A: 0. 003402 kg Copyright © 2007 Pearson Education Inc. , publishing as Pearson Benjamin Cummings

THE SCIENTIFIC METHOD Copyright © 2007 Pearson Education Inc. , publishing as Pearson Benjamin

The scientific method= a way to ask and answer scientific questions by making observations

Although the exact wording may be slightly different the “big picture” is always the

YOU NOTICE SOMETHING YOU WONDER WHY YOU MAKE AN EDUCATED GUESS AS TO WHY POSSIBLE SOLUTION TO YOUR GUESS TEST YOUR SOLUTION Figure 1. 18 Copyright © 2007 Pearson Education Inc. , publishing as Pearson Benjamin Cummings