What would be the best microscope to view living single-celled organisms in a sample of pond water?

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 are the two main phases of a cell cycle

What is a sex-linked genetic disorder that disrupts the blood's ability to clot? a. achondroplasia b. huntington's disease c. hemophilia d. albinism