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
• 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.”
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.
9 Characteristics of Living Things
A universal genetic code
DNA.
9 Characteristics of Living Things
Grow and develop
Single fertilized egg divides again and again
They differentiate, which means they perform
different functions.
9 Characteristics of Living Things
Respond to their environment
Stimulus: signal to which an organism responds.
9 Characteristics of Living Things
Reproduce
Mostplants 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 Characteristics of Living Things
Maintain homeostasis
Relatively stable internal environment.
9 Characteristics of Living Things
Metabolism
Obtainand use material and energy to grow, develop,
and reproduce.
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.
9 Characteristics of Living Things
Groups of organisms evolve.
Big Ideas in Biology
Cellular basis of life Evolution
Information and Structure and function
heredity Unity and diversity of
Matter and energy life
Growth, development, Interdependence in
and reproduction nature
Homeostasis Science as a way of
knowing.
Fields of Biology
Global Ecology
Biotechnology
Building the Tree of Life
Ecology and Evolution of Infectious Diseases
Genomics and Molecular Biology
Scientific Measurement
Scientists use the metric system when collecting
data and performing experiments.
Scientific Measurement
1 kilometer = ___ meters
.45 liters = ___milliliters
5000 milligrams = ___grams
130 meters = ___ kilometers
2500 milliliters = ___liters
.017 grams = ___milligrams
Scientific Measurement
1 kilometer = 1000 meters
.45 liters = ___milliliters
5000 milligrams = ___grams
130 meters = ___ kilometers
2500 milliliters = ___liters
.017 grams = ___milligrams
Scientific Measurement
1 kilometer = 1000 meters
.45 liters = 450 milliliters
5000 milligrams = ___grams
130 meters = ___ kilometers
2500 milliliters = ___liters
.017 grams = ___milligrams
Scientific Measurement
1 kilometer = 1000 meters
.45 liters = 450 milliliters
5000 milligrams = 5 grams
130 meters = ___ kilometers
2500 milliliters = ___liters
.017 grams = ___milligrams
Scientific Measurement
1 kilometer = 1000 meters
.45 liters = 450 milliliters
5000 milligrams = 5 grams
130 meters = .13 kilometers
2500 milliliters = ___liters
.017 grams = ___milligrams
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
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