Cell Theory

Front

What is Cell Theory?

Back

Cell Theory is a fundamental concept in biology that states: 1) All living organisms are composed of one or more cells. 2) The cell is the basic unit of structure and organization in organisms. 3) All cells come from pre-existing cells.

Front

Why are cells considered the building blocks of life?

Back

Cells are considered the building blocks of life because they are the smallest unit of living matter and make up all living organisms.

Tags

NGSS.MS-LS1-1

Front

What is a prokaryotic cell?

Back

A prokaryotic cell is a type of cell that does not have a nucleus or other membrane-bound organelles. Examples include bacteria.

Front

What is a eukaryotic cell?

Back

A eukaryotic cell is a type of cell that has a nucleus and membrane-bound organelles. Examples include plant and animal cells.

Front

Who was Robert Hooke?

Back

Robert Hooke was a scientist who is credited with the discovery of cells. He coined the term 'cell' after observing cork under a microscope.

Tags

NGSS.MS-LS1-1

Front

What did Anton Van Leeuwenhoek contribute to cell theory?

Back

Anton Van Leeuwenhoek is known for his work in microscopy and was the first to observe living cells, which he called 'animalcules'.

Front

What is the basic unit of life?

Back

The basic unit of life is the cell.

Tags

NGSS.MS-LS1-1

NGSS.MS-LS1-2

Front

What does it mean that cells come from pre-existing cells?

Back

It means that new cells are produced by the division of existing cells, rather than arising spontaneously.

Front

What is the difference between prokaryotic and eukaryotic cells?

Back

Prokaryotic cells lack a nucleus and membrane-bound organelles, while eukaryotic cells have a nucleus and organelles.

Front

What is the significance of cell membranes?

Back

Cell membranes protect the cell and regulate what enters and exits, maintaining homeostasis.

Tags

NGSS.MS-LS1-2