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What is Biology?
Transcript of What is Biology?
The Study of Living Things
What are Living Things?
All Living Things Have These Properties of Life...
A Broad Subject
Biology is a very broad branch of science, because life is very, very complex.
Nobody can be an expert in every area of biology, so scientists specialize.
Many Specialized Fields...
Applications of Biology
Read the text under "What do biologists do?" on pages 5 and 6 of your text book.
On your own paper,
identify the kind of biology career that you think would interest you the most. Why does this application of biology interest you
Brainstorm with your group and discuss what properties you think all living things share. In your Science Journal, list the things that you think are necessary for something to be "alive".
It May Seem Silly...
... but determining what we consider to be alive and what we don't is not as simple as it seems.
You might think that it would be obvious, but things can be a little complicated.
Properties of Life
The things that we consider to be alive all have certain properties in common.
... like viruses can cause confusion, because they have some, but not all, of the properties of life.
All living things are made of one or more cells.
Everything a living organism does depends on chemical reactions; obtaining energy, sensing their environment, moving and everything else.
The sum of all of these chemical reactions is its
The study of life at the cellular level.
The study of how traits are passed down from one generation to the next.
The study of plants.
The study of the chemical processes within and relating to living things.
The study of how living organisms interact with each other and their environment.
The study of evolutionary processes that lead to the diversity of life on Earth.
The study of tiny, microscopic organisms.
The study of animals.
The study of the human body.
Living things respond to their environment. They they hide, they seek out food and mates, etc.
Responds to Stimuli
Organisms reproduce and pass along traits from one generation to the next. Reproduction must occur for living things to continue to exist.
New traits appear in populations and are inherited, allowing a population to
to its environment over time.
This results in
Living things grow and develop over their lifetimes.
Single celled organisms may grow and divide very quickly.
Some organisms, like red woods or blue whales, may grow to enormous size.
Review the characteristics of life in your textbook. (pages 6 - 10)
On your paper, list each characteristic, describe it, and explain how human beings display that characteristic.
Lastly, answer questions 2-4 on page 10. Write each question and answer in complete sentences
All living things have the following properties:
The bodies of living things are arranged in an organized fashion; structures serve a purpose.
Living things have to maintain internal conditions like having certain amounts of water, salts, and a constant body temperature. Living things are constantly adjusting to their internal and external environment.