biology 101 professor ben winslow tue, wed, thur 9-12

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Biology 101 Professor Ben Winslow Tue, Wed, Thur 9-12

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Page 1: Biology 101 Professor Ben Winslow Tue, Wed, Thur 9-12

Biology 101

Professor Ben WinslowTue, Wed, Thur 9-12

Page 2: Biology 101 Professor Ben Winslow Tue, Wed, Thur 9-12

Outline:

-What is science and how is it done?

-Scientific theories

-Characteristics of life

Page 3: Biology 101 Professor Ben Winslow Tue, Wed, Thur 9-12

What is science?

Page 4: Biology 101 Professor Ben Winslow Tue, Wed, Thur 9-12

Correlation does not equal causation

Marathon heart-attack deaths rise

By Jack KellyPittsburgh Post-Gazette staffTue, 05/15/2012 - 2:25pmRunners suffered heart attacks in the Boston Marathon in April, the Myrtle Beach, S.C., Marathon in February, the New York and Philadelphia marathons last November and the Chicago Marathon last October. These incidents sparked renewed interest in possible links between distance running and heart failure.

http://www.standard.net/authors/jack-kelly

http://www.standard.net/authors/jack-kelly

http://www.standard.net/category/author-organization/pittsburgh-post-gazette

http://www.standard.net/category/author-organization/pittsburgh-post-gazette

http://www.standard.net/category/author-type/staff

Page 5: Biology 101 Professor Ben Winslow Tue, Wed, Thur 9-12

What is a hypothesis?

- A potential explanation of a natural phenomenon

Page 6: Biology 101 Professor Ben Winslow Tue, Wed, Thur 9-12

Why is there an “ozone hole” in Antarctica?

Hypothesis 1 - This observation is a freak weather event

Hypothesis 2 - The ozone hole is caused by human activity

Page 7: Biology 101 Professor Ben Winslow Tue, Wed, Thur 9-12

Why is there an “ozone hole” in Antarctica?

Page 8: Biology 101 Professor Ben Winslow Tue, Wed, Thur 9-12

What is a scientific theory?

- A basic statement that is supported by many observations and experiments

Page 9: Biology 101 Professor Ben Winslow Tue, Wed, Thur 9-12

Cell theory-1600’s - Hooke looked at cork and identified cells

-Shortly afterwards Leeuwenhoek observed many single celled organisms in pond water

-1839 - Schleiden and Schwann formalized “cell theory”

-All living organisms are made of cells

-All cells come from other cells

Page 10: Biology 101 Professor Ben Winslow Tue, Wed, Thur 9-12

Theory of heredity-Genes are inherited from parent to offspring in discrete units (Mendel)

-Chromosomal theory of inheritance - Genes reside on chromosomes, which are physically inherited

Page 11: Biology 101 Professor Ben Winslow Tue, Wed, Thur 9-12

Gene Theory

-“Genes” are encoded in DNA

-Genes encode for proteins and RNA that make up organisms

Page 12: Biology 101 Professor Ben Winslow Tue, Wed, Thur 9-12

Page 13: Biology 101 Professor Ben Winslow Tue, Wed, Thur 9-12

Theory of evolution by natural selection

Page 14: Biology 101 Professor Ben Winslow Tue, Wed, Thur 9-12

Characteristics of life - Kingdoms

6 kingdoms

3 domains

Page 15: Biology 101 Professor Ben Winslow Tue, Wed, Thur 9-12

Characteristics of life - Cellular

Page 16: Biology 101 Professor Ben Winslow Tue, Wed, Thur 9-12

Characteristics of life - Metabolism

All organisms require chemical energy

Page 17: Biology 101 Professor Ben Winslow Tue, Wed, Thur 9-12

Characteristics of life - Homeostasis

Homeostasis is the maintenance of a controlled internal environment

Page 18: Biology 101 Professor Ben Winslow Tue, Wed, Thur 9-12

Characteristics of life - Growth

-Cells grow by adding mass

-Large cells divide into multiple smaller cells

-Multicellular organisms grow by adding cells

Page 19: Biology 101 Professor Ben Winslow Tue, Wed, Thur 9-12

Characteristics of life - Heredity

- Offspring inherit chromosomes from their parent(s)

Page 20: Biology 101 Professor Ben Winslow Tue, Wed, Thur 9-12

Life is hierarchical

Molecular

Organismal

Ecological

Page 21: Biology 101 Professor Ben Winslow Tue, Wed, Thur 9-12

Life is hierarchical

Molecular

Organismal

Ecological

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