Cell Theory

Which invention from the 17th century allowed for the development of modern cell theory?

• x-rays
• computers
• the light microscope
• the scanning electron microscope

Cell theory was first proposed in 1838. Evidence obtained through additional scientific investigations resulted in the current cell theory. Which statement describes a component of the original cell theory that was removed because of the new scientific knowledge?

•  All living things are made of cells.
• All cells come from other preexisting cells.
• Cells form through spontaneous generation.
•  Cells are the basic structural and functional units of life.
  

 Cells are the basic structural and functional units of life.

• Plants have cells but animals do not.
•  They are both made of one or more cells. 
• They both come from the same kind of cell.
• They both come from a non-living organism.

Tags

NGSS.MS-LS1-1

The combined observations of Mattias Schleiden, Theodor Schwann and Rudolph Virchow resulted in the formation of the cell theory. Which of the following is not part of the cell theory?

• All cells contain a nucleus. 
• All cells come from other living cells.
• All living organisms are made of one or more cells
•  Cells are the basic unit of structure and function of all living things.

Tags

NGSS.MS-LS1-1

A plant and an animal are both living things. According to the Cell Theory, what can you conclude about these two very different organisms?

• Plants have cells but animals do not.
• They are both made of one or more cells. 
• They both come from the same kind of cell.
• They both come from a non-living organism.

Tags

NGSS.MS-LS1-1

Rudolph Virchow's observations helped to disprove was commonly held belief of the time?

• evolution
• the existence of molecules
• spontaneous generation
• atomic models

Cell theory states:

• All living cells must have a cell wall.
•  All living cells require glucose for survival.
• The basic unit of life is a cell.
• All cells contain a nucleus

Tags

NGSS.MS-LS1-1

 Which of the following is NOT one of the main components of the cell theory?

• cells must contain DNA
• all living things are made of cells
• cells can only come from other cells
• cells are the basic unit of life

Unlike eukaryotes, prokaryotes do not have:

• DNA
• cytoplasm
• cell walls
• a membrane bound nucleus

Tags

NGSS.MS-LS4-2

The smallest unit that can perform the basic activities of life is

• a cell 
• a tissue
• an organ
• an organism

Tags

NGSS.MS-LS1-1

NGSS.MS-LS1-2