Cell
the smallest functional and structural unit of all living organisms
Organism
Any living thing that carries out its own life process
Robert Hooke
First to describe cells,he looked at the bark of a cork tree under a microscope
Cells
Are small because their size is limited by their outer surface area
Cells, nutrients, wastes
________ get too large, they cannot take enough _____________ or get rid of _________
Cell theory
1. All organisms are made up of one or more cells2. The cell is the basic unit of all organisms3. All cells come from existing
Anton van Leeuwenhoek
First to describe living cells
Matthias Schleiden
Who concluded that all plants are made of cells
Theodor Schwann
Determined that all animal tissues are made of cells
Rudolf Virchow
Proposed that cells could form only from the division of other cells
unicelluar organisms
Organisms made up of just one cell are called
Multicellular organisms
Made up of more than one cell are called
Cell membrane
A protective layer that covers the cell's surface and controls materials moving into and out of the cell.
cytoplasm, nucleus
Is the region inside the cell that includes the fluid and all the organelles except for the ___________
Organelle
Small body in the cytoplasm that is specialized to perform a specific function.
Nucleus, contains DNA
Is a membrane bound organelle that ___________ ____
DNA
Is a genetic material that provides instructions for all cell processes.
Prokaryotes
Single-called organisms that do not have a nucleus or membrane-bound organelles
Prokaryotes, Ribosomes
DNA is in the cytoplasm. They have organelles without cell membranes called ___________
Prokaryotes, Flagella
Have hairlike structures called __________ that help them move
Eukaryotes
Organisms made up of cells that contain DNA in a nucleus, membrane-bound organelles, and ribosomes
Animals, plants, protists, and fungi
What are four examples of eukaryotes?
Multicellular, unicellular
Most eukaryotes are ________________ but some are ____________