Intro to Cells (CLASS 1)

What is the first principle of Cell Theory?

All living things are composed of cells.

What is the second principle of Cell Theory?

Cells are the basic units of structure and function in living things.

What is the third principle of Cell Theory?

New cells are produced from existing cells.

All cells have

cell membrane, cytoplasm, DNA, ribosomes, cytoskeleton

endosymbiotic theory

eukaryotic cells evolved from a symbiotic relationship between different species of prokaryotes

Plant cells have

chloroplasts, cell wall, large central vacuole

Animal cells have

Nucleus, cytoplasm, cell membrane, mitochondria, ribosomes

Prokaryotic Cells

do not have a nucleus or other membrane-bound organelles

Eukaryotic cells

Contain a nucleus and other organelles that are bound by membranes.

electron microscope

microscope that forms an image by focusing beams of electrons onto a specimen

light microscope

microscope that uses a beam of light passing through one or more lenses to magnify an object

Bacteria

Domain of unicellular prokaryotes that have cell walls containing murien (peptidoglycan)