Cell Theory
Biology ⇒ Cell Biology
Cell Theory starts at 6 and continues till grade 12.
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Describe how cell theory supports the concept of continuity of life.
Describe one piece of evidence that supports the idea that all cells come from pre-existing cells.
Describe one way in which the cell theory has influenced modern medicine.
Describe the main difference between prokaryotic and eukaryotic cells in the context of cell theory.
Explain how the cell theory changed the way scientists view the organization of living things.
Explain why multicellular organisms are considered to be made up of many cells rather than one large cell.
A scientist observes a structure that can reproduce, respond to stimuli, and metabolize, but is not made of cells. According to cell theory, is this structure considered alive?
A researcher discovers a new microscopic structure that can metabolize, grow, and respond to stimuli, but it lacks a plasma membrane and is not composed of cells. Based on cell theory, should this structure be classified as a living organism? Justify your answer.
Which of the following best describes the contribution of Rudolf Virchow to cell theory?
(1) He discovered the cell nucleus.
(2) He stated that all cells come from pre-existing cells.
(3) He invented the microscope.
(4) He discovered plant cells.
Which of the following best summarizes the three main points of the classical cell theory?
(1) All living things are made of cells, cells are the basic unit of life, and all cells come from pre-existing cells.
(2) All living things are made of tissues, tissues are made of organs, and organs are made of cells.
(3) All living things are made of molecules, molecules are made of atoms, and atoms are made of protons.
(4) All living things are made of cells, all cells have a nucleus, and all cells are eukaryotic.
Which of the following is a direct implication of cell theory for the study of diseases?
(1) Diseases are caused by supernatural forces.
(2) Diseases can result from malfunctioning cells.
(3) Diseases only affect multicellular organisms.
(4) Diseases are unrelated to cells.
Which of the following is a limitation of the cell theory?
(1) It does not explain the origin of the first cell.
(2) It applies only to animals.
(3) It states that all cells have chloroplasts.
(4) It excludes bacteria.
Fill in the blank: According to cell theory, the activities of an organism depend on the total activity of its __________.
Fill in the blank: Matthias Schleiden concluded that all __________ are made of cells.
Fill in the blank: The basic unit of structure and function in living organisms is the __________.
Fill in the blank: The cell theory helped disprove the idea of __________ generation.
A scientist observes a structure that can reproduce, respond to stimuli, and metabolize, but is not made of cells. According to cell theory, is this structure considered alive?
True or False: According to cell theory, all cells must be able to reproduce independently.
True or False: According to cell theory, all cells must have mitochondria.
True or False: According to cell theory, viruses are considered living organisms.
