The Edwards Plateau is notes for containing many caves that were partly formed by geographic activity million of years ago. What else could have been contributed to the formation of these caves systems and aquifers?

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?

The vaccine in a flu shot contains weakened flu viruses. how does a flu shot work with the immune system? a. it destroys lymphocytes. b. it destroys macrophages. c. it activates macrophages. d. it activates lymphocytes.

Guard cells control which event? the growth of plants capture of solar energy gas exchange in leaves water absorption in roots