From the types of light that reach Earth's surface, which do you think could be causing skin cancer? Explain your reasoning.

Organisms within a population must compete for resources to survive

Animals such as pronghorn antelope, bison ans badgers dot to the landscape. where are these animals located?

Apopulation of black bears depends on salmon from a stream for food. if a drought causes the stream to run dry one year, how will this likely impact the black bear population?