The Cell Theory

The cell is considered the basic unit of life. The Cell Theory was developed over time using contributions of several scientists working in different fields. Which of the following is NOT part of the Cell Theory?

• All cells contain a nucleus.

• The cell is the basic unit of life.

• All organisms are composed of cells.

• All cells come from preexisting cells.

The cell theory took hundreds of years to develop. The scientists over the years added their discoveries to the theory when they were able to scientifically prove their ideas. What aided in the development of the discoveries over the years?

• The organisms were able to grow larger after several decades, which allowed the scientists to see them clearer.

• The continued development of the microscope helped the scientists to see smaller organisms and their cellular structures.

• The scientists were able to think for themselves as time went on.

• The development of eyeglasses that were used helped scientists to look deeper into cell structures.

Which technology was essential for the development of the cell theory?

• Microwave

• Telescope

• Antiseptics

• Microscope

While looking at a piece of cork, Robert Hooke saw different boxes that looked like compartments. He decided to call these compartments ______________.

• Cells

• Boxes

• Organisms

• Components

Tags

NGSS.MS-LS1-1

Who was the first scientist to see organisms under a microscope?

• Robert Hook

• Anton van Leeuwenhoek

• Matthias Schleiden

• Rudolf Virchow

Which scientist proposed that all plant tissues are composed of cells?

• Anton van Leeuwenhoek

• Theodor Schwann

• Matthias Schleiden

• Robert Hooke

Which scientist proposed that plants and animals are composed of cells?

• Theodor Schwann

• Robert Hooke

• Anton van Leeuweunhoek

• Rudolf Virchow

Tags

NGSS.MS-LS1-1

Which scientist added the third part of the cell theory which states, "All cells come from preexisting cells."

• Rudolf Virchow

• Robert Hooke

• Matthias Schleiden

• Theodor Schwann

All living things are composed of cells.

• True

• False

Tags

NGSS.MS-LS1-1

NGSS.MS-LS1-3

What is the best tool for observing cells?

• Microscope

• Telescope

• Magnifying Glass