a) what human activity can result in excessive levels of nitrates in lakes and streams and what negative effect can it have on the water? b)  what human activity can result in low pH (acidity) in lakes and streams and what negative effect can it have on the water?  

Saturated fats are mostly found in:

Vitamins are needed in:

A vegan diet includes:

a) What is the AQHI and what are three things that it measures? b) Describe how human activities can influence i) acid rain and ii) smog.

If carbon dioxide levels rise in the body, breathing rate will most likely:

The nasal conchae are important because they:

Medical asepsis is best described as:

Belief in an impersonal supernatural force, like the Polynesian concept of mana, is an example of ________________.

Games are a sub-type of play that are always defined by ________________.