Places on Earth that have similar climates often support plants and animals with similar physical and physiological traits. The best explanation of this phenomenon is ________.  

The total number of plant and animal species that a field biologist identifies along a mountain trail is an example of ________.  

Do connections between habitat patches increase their diversity? Evidence from current field research involving plants is determining that ________.  

What percentage of North America’s deciduous forests has been logged or cleared for agriculture?  

Chipmunks and flying squirrels competing for truffles is an example of ________.  

Agriculture and cattle grazing have altered over 90% of this biome.  

Species that are found only in specific environments or have restricted localities are said to be ________.  

Demodex folliculorum are tiny mites that live in the pores of your face. Being that you were probably unaware they existed until now, this would be an example of ________.  

Air and water pollution are directly responsible for the loss of some species. In their studies of these pollution effects, biologists have determined that _______ are especially sensitive to air pollution and are now being used as an index of urban air quality.  

Habitat fragmentation has been an important factor in the decline of ________ species in the United States.