Cell Theory Quiz L.14.1

Louis Pasteur determined that microbes only appeared in sterile broth if the broth was exposed to the air. He concluded that the microbes were found in the air and contaminated the broth. Pasteur’s findings contributed to which part of the cell theory?

• All animals are made of cells.

• All cells come from preexisting cells.

• The cell is the basic functional unit in living things.

• Unicellular organisms inherit an exact copy of DNA from the parent cell.

The timeline below shows contributions to a biological theory. Which biological theory was being formed during this timeline?

• cell theory

• germ theory

• theory of evolution

• theory of acquired characteristics

Which of the following statements about a plant cell is supported by the cell theory?

• A plant cell has a cell wall made of cellulose.

• A plant cell can divide to produce more plant cells.

• A plant cell is able to metabolize carbohydrates for energy.

• A plant cell can harness energy from the sun through photosynthesis.

Tags

NGSS.MS-LS1-2

NGSS.MS-LS1-6

Which discovery was the earliest step in the scientific development of the modern cell theory?

• Aristotle discussed the idea of spontaneous generation.

• Flemming used dyes to stain cells so they could be observed more clearly.

• Hooke and von Leeuwenhoek observed cells and tiny organisms with microscopes.

• Schleiden and Schwann published papers stating that plants and animals were made of cells.

Cancer starts as one cell that replicates uncontrollably. Eventually those cancer cells may become a tumor. Which statement best supports these facts? 

• Cells are the basic unit of life.

• Cells come from pre-existing cells.

• Cells make up all living organisms.

• Cells differentiate into specific types of cells.

Tags

NGSS.MS-LS1-1

NGSS.MS-LS3-1

Early elements of the cell theory followed soon after the development of Hooke's light microscope. What does this relationship suggest about the evolution of the cell theory since Hooke?

• Scientists needed to focus less on cells and more on microscope development.

• Improvements in technology are closely related to changes in the cell theory.

• Progress on the cell theory was delayed by a lack of technological progress.

• 
  Isolated scientists contributed pieces of the cell theory to form the whole.

Cell theory helps explain what it means to be a living thing. Which of the following is NOT a principle included in modern cell theory?

• All living things are composed of one or more cells.

• Living cells appear spontaneously from nonliving matter.

• 
  New cells are formed only by division of a preexisting cell.

• The cell is the basic unit of structure and function for all organisms.

Before cell theory, people believed that living organisms arose from nonliving matter. What evidence resulted in cell theory eventually replacing the concept of spontaneous generation?

• evidence that microorganisms can be filtered out with contaminated particles

• evidence that microorganisms cannot grow in boiled broth if all the air is removed from a container

• 
  evidence that microorganisms cannot grow in boiled broth when new organisms were not allowed to enter

In 1839 Theodor Schwann used the scientific studies of several scientists to create the first “cell theory” which stated:

1 - All organisms consist of one or more cells.

2 - The cell is the basic unit of structure for all organisms.

 

In 1855 Rudolf Virchow added a third part which stated:

3 - All cells come from existing cells.

 

Which of the following best explains why the cell theory is a theory and not a law?

• Before becoming a law, a conclusion must first be a testable theory.

• There was not enough scientific evidence during this time period to support Schwann’s ideas as a law.

• Information about living organisms can only be classified as a theory because organisms are always evolving.

• A theory is based on the most current experimental data and may change as new technology and discoveries are made.

The diagram below represents the development of a scientific theory that laid the foundation for further scientific processes.

Which scientific theory is represented in the diagram?

• cell theory

• 
  atomic theory

• 
  theory of evolution

• 
  theory of inheritance