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Corn and cotton crops were modified to produce toxins that kill insects, reducing the use of pesticides. 

Where does mercury water pollution come from? 

Our global ecological footprint is 50% more than the Earth can support. 

Herbivory is actually a type of predation. 

Competition among individuals of the same species is                        competition. 

In the food chain grass → antelope → human → lion, the antelope is:

Which of the following macromolecules require(s) phosphorous (P) to synthesize?  SELECT ALL THAT  APPLY.    

The pressure in the pleural cavity is called the _______.

Which statement is TRUE about the patient with a history of alpha 1-antitrypsin deficiency? 

Without a functioning crista ampullaris, the semicircular canals would not function.