Lack of water is the primary factor that determines that an area will be a desert

Hot desert.

Cold desert 

Desert    Location 

Sahara  N. Africa 

Kolahari                      S. Africa 

Coastal Atacama              Peru

Sonoran               North American 

Simpson          Australia 

 

TLS Online TPP Program

#Id: 5873

#Unit 10. Ecological Principles

Solar radiation, in the form of short-wave energy, passes through the atmosphere to heat the Earth’s surface. 

Long-wave infrared energy is radiated back into the atmosphere. 

Most infrared energy is reflected by atmospheric gases, including carbon dioxide molecules, back to Earth, causing global temperatures to rise.

TLS Online TPP Program

#Id: 7223

#Unit 5. Developmental Biology

Thymic selection The most distinctive property of the mature T cells is that they recognize only foreign antigen combined with self-MHC molecules.

TLS Online TPP Program

#Id: 9905

#Unit 4. Cell Communication and Cell Signaling

TLS Online TPP Program

#Id: 1941

#Unit 4. Cell Communication and Cell Signaling

Microbial Complement Evasion strategies

TLS Online TPP Program

#Id: 6987

#Unit 5. Developmental Biology

Cell potency is a cell’s ability to differentiate into other cell types. Stem cell has the power, or potency, to produce many different types of differentiated cells.