The variety of metabolic compounds in an ecosystem is called _______________________.  

Which of the following is NOT a medication that your text lists as being derived from a plant compound?

Which of the following is currently most threatened by the bush meat trade? 

When exposed to water, sodium chloride (NaCl) ____.

____________________ is measured as the number of species and the number of individuals in each of these species.  

One of the places on earth that is experiencing the highest extinction rates is 

Species that are only found in one location are called ____________________. 

How does the energy of an electron relate with the distance from the nucleus?

Although carbon dioxide contains carbon, it is not considered an “organic” compound because ____.

Nitrogen, with an atomic number of 7, has ____ electron(s) in the first energy level and ____ electrons in the second energy level.