1. Review - What are the themes in biology that come up again and again
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Transcript of 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 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 BIOLOGY1.3 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 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 Characteristics of Living Things
Maintain homeostasis Relatively stable internal environment.
9 Characteristics of Living Things
Metabolism Obtain and 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 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.
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