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Herbivores are primary consumers.

Any set of components that interacts in a regular way describes a ___________________.      

Degrading, wasting, or depleting the earth’s natural capital is termed environmental degradation. 

The hydrological cycle is also referred to as the _________________ cycle.

____________________ is the number of different kind of species in an ecosystem.  It is one of the four components of biodiversity.

List one principle of sustainability.

List another principle of sustainability.  

The following is one of the components of the earths life support system:

Generalist species have narrow niches and require specific habitats and environmental conditions.

__________________ are types of cells that are enclosed by a membrane but have no distinct membrane bound nucleus.