Transcript Science of Biology

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?
SCIENCE OF BIOLOGY
1.3 Studying Life
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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.
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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.”
Characteristics of Living Things
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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.
9 Characteristics of Living Things
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A universal genetic code
 DNA.
9 Characteristics of Living Things
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Grow and develop
 Single
fertilized egg divides again and again
 They differentiate, which means they perform
different functions.
9 Characteristics of Living Things
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Respond to their environment
 Stimulus:
signal to which an organism responds.
9 Characteristics of Living Things
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Reproduce
 Most
plants and animals engage in sexual
reproduction
 Cells from two
parents unite to form the first cell of a new
organism
 Asexual
 Single
reproduction
organism produces offspring identical to itself.
9 Characteristics of Living Things
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Maintain homeostasis
 Relatively
stable internal environment.
9 Characteristics of Living Things
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Metabolism
 Obtain
and use material and energy to grow, develop,
and reproduce.
9 Characteristics of Living Things
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Made up of one or more cells
 Cells
can grow, respond to their surroundings, and
reproduce
 Cells are complex and highly organized.
9 Characteristics of Living Things
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Groups of organisms evolve.
Big Ideas in Biology
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Cellular basis of life
Information and
heredity
Matter and energy
Growth, development,
and reproduction
Homeostasis
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Evolution
Structure and function
Unity and diversity of
life
Interdependence in
nature
Science as a way of
knowing.
Fields of Biology
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Global Ecology
Biotechnology
Building the Tree of Life
Ecology and Evolution of Infectious Diseases
Genomics and Molecular Biology
Scientific Measurement
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Scientists use the metric system when collecting
data and performing experiments.
Scientific Measurement
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1 kilometer = ___ meters
.45 liters = ___milliliters
5000 milligrams = ___grams
130 meters = ___ kilometers
2500 milliliters = ___liters
.017 grams = ___milligrams
Scientific Measurement
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1 kilometer = 1000 meters
.45 liters = ___milliliters
5000 milligrams = ___grams
130 meters = ___ kilometers
2500 milliliters = ___liters
.017 grams = ___milligrams
Scientific Measurement
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1 kilometer = 1000 meters
.45 liters = 450 milliliters
5000 milligrams = ___grams
130 meters = ___ kilometers
2500 milliliters = ___liters
.017 grams = ___milligrams
Scientific Measurement
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1 kilometer = 1000 meters
.45 liters = 450 milliliters
5000 milligrams = 5 grams
130 meters = ___ kilometers
2500 milliliters = ___liters
.017 grams = ___milligrams
Scientific Measurement
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1 kilometer = 1000 meters
.45 liters = 450 milliliters
5000 milligrams = 5 grams
130 meters = .13 kilometers
2500 milliliters = ___liters
.017 grams = ___milligrams
Scientific Measurement
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1 kilometer = 1000 meters
.45 liters = 450 milliliters
5000 milligrams = 5 grams
130 meters = .13 kilometers
2500 milliliters = 2.5 liters
.017 grams = ___milligrams
Scientific Measurement
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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