1665, Englishman used compound microscope to look at cork. Called what he saw (tiny, empty chambers) \

1674, used a single-les microscope to observe pond water. Saw tiny living organisms, even in drinking water.

Cell Theory

basic units of life

Uses a pencil-like beam of electrons which is scanned over the surface of a specimen. Does not have to cut specimens into thin slices.

makes it possible to explore cell structures and large protein molecules. Because beams of electrons cannot pass through thin samples, cells and tissues must be cut first.

----

test not finished

test not finished

test not finished

Teachers: Create FREE classroom games with your questions Click for more info!
©2007-2024 Review Game Zone | About | Privacy | Contact | Terms | Site Map