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6 The structures in our bodies work together and each performs a specific task.
The diagram below shows the hierarchy of structures within the human body.
?
A picture of which of the following structures belongs in the box above?
A. organ
B. neuron
C. macromolecule
D. organ system
7 The cell theory applies to all organisms, including the five shown below.
Euglena Fungi Cactus Snail Leopard
Study the images above. Which of the following statements best describes why
these organisms are all examples of the cell theory?
A. The organisms all have cells that lack a nucleus.
B. The organisms are all made up of one or more cells.
C. The cells in all the organisms perform exactly the same functions.
D. The organisms all have one cell.
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