Lesson 1 - What Is a Cell?

cell

A(n) ____ is the basic building block or unit of life.

___ is made up of prokaryotic cells.

Bacteria

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Eukaryotic

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Prokaryotic

-- cells do not have a nucleus, while -- cells do have a nucleus.

Prokaryotic, Eukaryotic

Nucleous

The __________ is the control center of the cell.

is a gel in the cell that surrounds all of the organelles.

cytoplasm

are bodies in cells that help cells live, grow and reproduce.

organelles

___ and ___ are composed of eukaryotic cells.

plants and animals

A cell or -- membrane is a covering on the outside of a cell that acts as a barrier to the outside environment.

plasma

The cell theory states:

•All living organisms are composed of one or more cells. •The cell is the basic unit of life in living things. •All cells come from existing cells.