How might the way a biologist uses a microscope be different from the way a docter uses a microscope?

Which group of chordates does  notpossess true backbones?                 a.  birds      b.  frogs and toads      c.  lampreys      d.  crocodilians

What causes the force that pushes magma from the magma chamber through the pipe and vent of a volcano?

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