Where are the photic, aphotic, littoral, limnetic, and benthic zones located at in a lake

What makes the results of a scientific experiment accurate? a) having multiple trials b) lacking any supporting data c) working in a lab d) using a hypothesis that is always true

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?

What would happen if the tubing with the yellow band was placed in a beaker of distilled water?