Multiple Choice
Which hormone aids in regulating intestinal absorption of calcium and phosphorus?
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10. Cell Signaling
Introduction to Cell Signaling
Multiple Choice
Which of the following best describes the three main components of the cell theory?
A
Cells are only found in animals; cells are produced by spontaneous generation; cells are the smallest particles of matter.
B
All living things are made of tissues; cells contain a nucleus; cells can survive independently.
C
All organisms are multicellular; cells do not divide; cells are made only of proteins.
D
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.
Verified step by step guidance1
Step 1: Understand the concept of the cell theory. The cell theory is a fundamental principle in biology that explains the properties and functions of cells, which are the building blocks of life.
Step 2: Break down the three main components of the cell theory. These are: (1) All living things are composed of cells, (2) Cells are the basic unit of structure and function in living organisms, and (3) All cells arise from pre-existing cells.
Step 3: Analyze the options provided in the problem. Compare each statement to the three components of the cell theory to determine which aligns with the established scientific understanding.
Step 4: Eliminate incorrect options. For example, statements like 'cells are produced by spontaneous generation' contradict the principle that cells arise from pre-existing cells, and 'cells are only found in animals' is incorrect because cells are found in all living organisms, including plants and microorganisms.
Step 5: Identify the correct answer. The statement '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' accurately describes the three main components of the cell theory.
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