What is the trophic level of an herbivore such as a cow that eats only grass? 

What is the major source of nitrogen in the nitrogen biogeochemical cycle?

What is one reason that a certain percentage of land was preserved on islands such as Mauritius and Tobago during the 1700s when they were English and French colonies?

Which biogeochemical cycle is a slow cycle because the element is not found in gas form and because the main source is in rock formations, which take a long to make and to break down?

When describing the parts of a biogeochemical cycle the term “sink” refers to  

Scientific Consensus is often interpreted as “most scientists agree” however this is misleading because science should be based on  ___ not ____.

 A niche can be defined as 

A population is defined as 

The epithelium best adapted for a body surface subject to abrasion is

The advantage of excreting wastes as urea rather than as ammonia is that