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Which of the following was NOT a consequence of urbanization and lucrative trading?

Briefly explain why lichens (fungus+alage) are great pioneer species during primary succession. (Complete sentences needed)

All of the following apply to the particulate matter (PMs) pollutants, EXCEPT: 

List two consequences of malnourishment mentioned in the lecture. 

Pathogens and waterborne diseases enter drinking water supplies from ________.

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.