Fourteen students are working on the experiment is this observation or inference

The term used to describe a disease-causing microorganism isa. virus.b. infection.c. pathogen.d. microbe.e. bacterium.

Sea stars, sea urchins, sand dollars, and brittle stars are all memeber of a group, what is the common name of the group they are all in

The diagram shows the layers of earth. convection currents in which region influence the movement of tectonic plates