How do the free-floating microbes and the bottom dwelling microbes make food?

Transmission electron microscope are best for viewing a) microorganisms in pond water b) internal organs of a mouse c)internal structures of a cell d) surface features of a specimen

The idea of spontaneous generation was disproved by in a experiment involving jars of meat

Which component in a graph indicates an independent factor? a. y-axis b. x-axis c. scale