Which of the following best describes the relationship between scientific theories and scientific laws?

Scientific laws and theories are supported by evidence and allow predictions.

Scientific theories become scientific laws when proven.

Scientific laws explain why something happens, while theories describe what happens.

Scientific theories and laws are not related.

What is the difference between a scientific law and theory?

A scientific law describes what happens; a theory explains why it happens.

A scientific law is a guess; a theory is a proven fact.

A scientific law explains why things happen; a theory describes what happens.

A scientific law is always true; a theory is never tested.

Which of the following statements about scientific laws and theories is/are correct?

Both are supported by empirical data and are reliable forms of scientific knowledge.

Scientific laws describe why something happens, while theories explain how.

Scientific theories are less reliable than scientific laws.

Scientific laws and theories are the same thing.

Which of the following is NOT a characteristic of science?

Cannot change as new data becomes available

Which statements are part of the cell theory?

Living things are composed of cells.

Cells are the basic unit of life.

All cells come from pre-existing cells.

Cells can spontaneously generate.

Which of the following statements are true about the early development of cell theory?

Jansen invented the compound light microscope

Van Leeuwenhoek observed bacteria and called them animalcules

Hooke was the first to use the word `cell`

Schleiden invented the microscope

What was the significance of Hooke's use of the word 'cell' in the biology?

It gave scientists a common language

It led to the invention of the microscope.

It proved all living things are animals.

Which of the following is NOT a main tenet of the cell theory?

Cells spontaneously crystallize into existence.

All organisms are composed of one or more cells.

The cell is the basic unit of structure and organization in organisms.

All cells come from preexisting cells.

Which pair of scientists contributed to the cell theory by discovering that all plants and all animals, respectively, are made of cells?

Matthias Schleiden and Theodore Schwann

Robert Hooke and Anton van Leeuwenhoek

Rudolf Virchow and Robert Remack

Zacharias Jansen and Isaac Newton

Rudolf Virchow observed that cells reproduce by splitting off from pre-existing cells through a process we now know as mitosis. This was different from the commonly held belief of the time, which was that cells spontaneously generated out of nothing as they were needed. Virchow's observations have been repeated by other scientists over time to disprove the idea of spontaneous generation in favor of the Cell Theory. How does this example show the development of scientific theories in general?

Virchow's observations supported the idea that cells come from other cells, which is part of Cell Theory that has been supported by numerous other observations over time.

Virchow's observations supported the idea of spontaneous generation, but these ideas have been disproven over time.

Virchow's observations support both Cell Theory and spontaneous generation, and either idea can be accepted based on various scientists beliefs.

Virchow's observations in addition to other scientist's observations have been supported over a long period of time, which will allow Cell Theory to be elevated to a law in the next few years.

Matthias Schleiden was a botanist who observed that all plants were made of similar compartments called cells. He observed these cells under a microscope that group together to form specific tissue. Which parts of cell theory is most strongly supported by this observation?

Cells are the basic unit of life

All living things are made of cells

All cells come from pre-existing cells

Robert Hooke was the first person to observe that every sample of living things he observed under a microscope were composed of smaller compartments that reminded him of small rooms. Which part of cell theory does this observation support?

All living organisms are made of cells

Cells are the basic unit of life

All cells come from pre-exisiting cells

A biology student created this image to show different stages in the cell cycle. Which part of the current cell theory does it most likely support?

All cells come from preexisting cells.

The cell is the basic structure of life.

All organisms are made of one or more cells.

The cell only contains a nucleus and membrane.

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?

Cells form through spontaneous generation

All living things are made of cells.

All cells come from other preexisting cells.

Cells are the basic structural and functional units of life.

Bio 2.2 - Lesson 1: Cell Theory (Student Slides) Lesson

76 questions

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1.

SLIDE QUESTION

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2.

SLIDE QUESTION

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3.

SLIDE QUESTION

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4.

OPEN ENDED QUESTION

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Based on your prior knowledge, in what ways do you think the cell theory has influenced modern scientific research and our understanding of living organisms?

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SLIDE QUESTION

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6.

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7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why is it important to understand the difference between scientific theories and scientific laws?

Because it helps us understand how scientific knowledge is developed and applied.

Because laws are always more important than theories.

Because theories are just guesses and laws are facts.

Because only laws can be tested by experiments.

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Bio 2.2 - Lesson 1: Cell Theory (Student Slides)

76 questions

Based on your prior knowledge, in what ways do you think the cell theory has influenced modern scientific research and our understanding of living organisms?

Why is it important to understand the difference between scientific theories and scientific laws?

Which of the following best describes the relationship between scientific theories and scientific laws?

Scientific theories never become scientific laws BECAUSE…

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