FL Biology EOC - L.14.1 - The Cell Theory

The scientific theory of cells , also know as "The Cell Theory" describes how...

1) Cells come from pre-existing cells

2) Cells are the basic unit of life (structure and function)

3) All living things are made of cells

• True

• False

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Continuous investigations by Hooke, Leuwenhoek, Schleiden, Schwann and Virchow and new scientific information, gathered from the Invention of the microscope, influenced the development of the cell theory.

• True

• False

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When developing "The Cell Theory" scientific claims were evaluated through scientific argumentation, critical and logical thinking, and consideration of alternative explanations.

• True

• False

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A scientific theory is something that answers "why or "how" and it has been tested repeatedly and has "so far always been true. A law is a mathematical statement that tells "how" something happens.

• True

• False

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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.

Answer explanation

It was once believed that cells could form on their own. We now know that cells must form from preexisting cells.

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

• X-rays

• computers

• the light microscope

• the scanning electron microscope

Answer explanation

The light microscope allowed scientists to view actual cells for the first time. Hooke named cells after seeing little chambers that looked like cell in a monk monetary, similar to dorms.

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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

Answer explanation

All living things are made of cells, they are they are the most basic unit of life.

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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.

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Scientific law and a scientific theory are similar in that both

• are based on what we expect to happen based on natural history.

• describe the events that can be observed in nature.

• explain why events and conditions occur as they do in the natural world.

• represent a large amount of scientific investigation and evidence

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To help patients replenish bodily fluids quickly during an illness, doctors need to understand how cells behave in their environment. Doctors have confidence in what they know about how cells behave because

• cell theory has been tested, refined, and observed to be true over hundreds of years

• the basics of cell theory have not changed much since the original experiments

• large medical institutions have conducted their own experiments justifying cell theory

• what we know about cell theory has been published in reputable journals

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