College Board
2014 AP® Biology Free-Response Questions
The most popular AP science exam, Biology, also maintains the highest passing rate. The College Board releases old test questions covering trichomes and much more, along with statistics and scoring guidelines to help scholars study for...
University of Minnesota
Homeostasis of Thermoregulation
Whether you're battling the flu or trying to warm up on a chilly day, your body's ability to react to temperature change is fascinating! Anatomy scholars discover the fantastic feedback loops that control body temperature in a rigorous...
University of California
Ucmp: Hot Blooded or Cold Blooded?
An easy-to-understand explanation of what it means to either hot- or cold-blooded.
OpenStax
Open Stax: Anatomy and Physiology: Functions of the Integumentary System
Learn here all about how the integumentary system functions: such as protecting the body from invasion by microorganisms, chemicals, and other environmental factors; preventing dehydration; acting as a sensory organ; modulating body...
Sea World Parks & Entertainment
Sea World: Polar Bears
Outlines the characteristics of the polar bear, including classification, habitat, behaviors, and conservation. Helps students identify with polar bears with a list of "Books for Young Readers." Information at a level of upper...
CK-12 Foundation
Ck 12: Biology: Mammal Endothermy
[Free Registration/Login may be required to access all resource tools.] Describes how mammals maintain their body temperature.