1. LS.2a - Cell Theory and Microscopes

What is the basic unit of life according to the cell theory?

• Atom

• Molecule

• Cell

• Tissue

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VA.LS.2.a

Which scientist is credited with coining the term "cell" after observing cork under a microscope?

• Louis Pasteur

• Robert Hooke

• Anton van Leeuwenhoek

• Charles Darwin

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VA.LS.2.a

Explain how the development of the cell theory demonstrates the nature of science.

• It shows that scientific knowledge is static and unchanging.

• It illustrates how scientific theories are developed through observation and evidence.

• It proves that all scientific theories are eventually proven wrong.

• It demonstrates that science is based on opinions rather than facts.

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VA.LS.2.a

Which of the following is NOT a part of the cell theory?

• All living things are composed of cells.

• Cells are the basic unit of structure and function in living things.

• All cells arise from pre-existing cells.

• Cells can spontaneously generate from non-living matter.

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VA.LS.2.a

Describe one way in which the invention of the microscope contributed to the development of the cell theory.

• It allowed scientists to see atoms for the first time.

• It enabled the observation of cells, leading to the understanding that all living things are made of cells.

• It helped scientists discover the existence of DNA.

• It proved that cells could be created from non-living materials.

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VA.LS.2.a

Which of the following best describes the role of cells in living organisms?

• Cells are the smallest unit of matter.

• Cells are the basic unit of life and perform essential functions.

• Cells are only found in plants.

• Cells are the largest unit of life.

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VA.LS.2.a

How did the work of scientists like Schleiden and Schwann contribute to the cell theory?

• They discovered the structure of DNA.

• They proposed that all plants and animals are made of cells.

• They invented the first microscope.

• They proved that cells could arise from non-living matter.

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VA.LS.2.a

Which of the following statements is true about the cell theory?

• It was developed by a single scientist.

• It is a scientific theory that has been modified over time as new evidence has been discovered.

• It states that cells can be created from non-living materials.

• It is no longer considered valid in modern science.

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What evidence supports the idea that all cells arise from pre-existing cells?

• The observation of cell division under a microscope.

• The discovery of DNA.

• The ability to create cells in a laboratory from non-living materials.

• The presence of cells in all living organisms.

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VA.LS.2.a

Which of the following best explains why the cell theory is considered a fundamental concept in biology?

• It explains the chemical composition of cells.

• It provides a framework for understanding the structure and function of all living organisms.

• It describes the process of photosynthesis.

• It outlines the steps of cellular respiration.

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