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.  

Making meat an inefficient way to feed humans, the approximate transfer of energy from one trophic level to the next higher trophic level is ________.  

The reverse process of hydrolysis is:

What is the missing product in this chemical reaction?