2-1 Formative Cell Theory

1. Which of the following best defines a theory?

• A well-substantiated explanation of some aspect of the natural world that is based on a body of evidence.

• A statement that describes an observable occurrence in nature that appears to always be true.

• A prediction for the outcome of an experiment, based on scientific research and preexisting knowledge

• A guess for why a phenomenon occurs based on a trained scientist's opinion

1. Which of the following best defines a law?

• A well-substantiated explanation of some aspect of the natural world that is based on a body of evidence.

• A statement that describes an observable occurrence in nature that appears to always be true.

• A prediction for the outcome of an experiment, based on scientific research and preexisting knowledge

• A guess for why a phenomenon occurs based on a trained scientist's opinion

A cell is:

• the basic unit of life

• a type of tissue

• an organ system

• a group of organs

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NGSS.MS-LS1-1

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Select the option which accurately identifies the characteristics of Prokaryotic Cells and Eukaryotic Cells.

• Prokaryotic Cells: Do not have a nucleus, generally smaller and simpler, example: bacteria. Eukaryotic Cells: Have a nucleus, generally larger and more complex, example: plant and animal cells.

• Prokaryotic Cells: Have a nucleus, generally larger and more complex, example: plant and animal cells. Eukaryotic Cells: Do not have a nucleus, generally smaller and simpler, example: bacteria.

• Prokaryotic Cells: Have a nucleus, generally smaller and simpler, example: bacteria. Eukaryotic Cells: Do not have a nucleus, generally larger and more complex, example: plant and animal cells.

• Prokaryotic Cells: Do not have a nucleus, generally larger and more complex, example: plant and animal cells. Eukaryotic Cells: Have a nucleus, generally smaller and simpler, example: bacteria.

Discoveries which led to the Cell Theory include which of the following?

• Observation of cells by Robert Hooke, discovery of the nucleus, and realization that all living things are made of cells

• Discovery of DNA structure, invention of the telescope, and classification of plants

• Development of vaccines, discovery of antibiotics, and invention of the stethoscope

• Theory of evolution, discovery of gravity, and invention of the steam engine

List the first point of the Classical Cell Theory.

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

• All living organisms are made up of tissues only.

• Cells can exist without any living organism.

• All living organisms are composed of atoms only.

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NGSS.MS-LS1-1

List the second point of the Classical Cell Theory.

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

• All living things are made up of tissues.

• Cells can only be seen with a microscope.

• Cells are only found in animals.

Which statement is part of the Modern Cell Theory?

• Energy flow (metabolism and biochemistry) occurs within cells.

• All living things are made of cells.

• Cells do not contain genetic material.

• All cells come from other pre-existing cells.

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Which statement is a part of the Modern Cell Theory?

• Cells contain hereditary information (DNA) that is passed from cell to cell during cell division.

• Cells are only found in animals, not plants.

• Cells do not require energy to function.

• Cells can exist independently without any genetic material.

Which statement is a part of the Modern Cell Theory?

• All cells are basically the same in chemical composition in organisms of similar species.

• Cells can arise only from pre-existing cells.

• Cells are the basic structural and functional units of life.

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