Is Fever Adaptive?
What is a fever?
Elevated body temperature
Pyrogens are fever producing substances
Exogenous: endotoxins from gram negs
Endogenous: produced from own tissue
Leukocytes release endogenous in response to exogenous
Ecology The Study of the Distribution and
Abundance of Organisms
1) Organismal EcologyStudy of interaction of an organism
with living and non-living elements of its environment
Why do American pikas in the Sierra Nevada only live at altitudes
Why its colder at the poles than at the equator
Cause of Seasons
Species Richness of Land Birds
Contour lines represent number of
What pattern do you see?
From Cambell and Reece (2002)
What do these data teach us?
What causes t
What trophic levels do you see?
Energy Flow and Trophic Structure
All ecosystems consist of four components that are linked
by the flow of energy:
Primary producers (Fix carbon)
Consumers (primary, secondary, tertiary, quaternary)
REVIEW SHEET FOR EXAM 3. The following questions are designed to help you in studying for new material on the
third exam. These questions are not meant to be an all encompassing look at the material. In addition to these questions you
should review your l
What is Biodiversity?
What is Biodiversity
variety & differences
The term "biodiversity" describes the variations and
differences of the multiple forms of life which exist
upon the planet Earth.
Biodiversity can be considered
Chemical Signals in Animals
Hormones are chemical signals released
into body fluids
EVIDENCE THAT HORMONES EXIST
1. Cut all nerves
2. Add dilute HCl
to small intestine
(mimics arrival of