Toxic chemicals from factories dumped into the ocean makes marine organisms sick and leads to a decline in biodiversity.  What kind of threat to biodiversity is this?

We learned about keystone species and trophic cascades. Discuss keystone species and trophic cascades by describing how the re-introduction of wolves, a keystone species in the Yellowstone Park ecosystem, drove a trophic cascade, starting with elk, that led to the restoration of the Yellowstone National Park ecosystem.  In your discussion, describe how the absence of wolves affected elk, that, in turn, affected rivers and streams, and how the re-introduction of wolves rehabilitated rivers and streams that led to the restoration of the Yellowstone National Park ecosystem.

An effective way of conserving biodiversity is through enacting legislation to protect biodiversity.  What was enacted in 1973 to identify,  protect, and develop a management plan to bring back at-risk species to sustainable numbers?

Examine the image of a food web.  The following trophic levels are illustrated in the food web: producers, primary consumer, secondary consumer, tertiary consumer, top consumer.  Identify the trophic level(s) of the of the owl (in red circle) in the food web.  

The slope of this line is 

Given this graph, The relative minima occurs at the coordinates 

Which is FALSE about this equation?

An x-intercept of a graph has a y-coordinate of _____.

The graph of this equation is symmetric with respect to 

The following graph is NOT a function, and we know this because