| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.11 |
| Score | 0% | 62% |
In cell biology, where does DNA replication take place?
nucleus |
|
Golgi apparatus |
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cytoplasm |
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mitochondria |
The cell nucleus contains the genetic material of the cell and is where DNA replication takes place.
Which of the following states of matter exists at the lowest temperature?
solid |
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gas |
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liquid |
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none of these |
Solids exist at a lower temperature than liquids which exist at a lower temperature than gases.
Which of the following members of the food chain are most alike?
herbivores and autotrophs |
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primary consumers and omnivores |
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producers and tertiary consumers |
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scavengers and decomposers |
Like decomposers, scavengers also break down the dead bodies of plants and animals into simple nutrients. The difference is that scavengers operate on much larger refuse and dead animals (carrion). Decomposers then consume the much smaller particles left over by the scavengers.
An electrically charged atom is a(n):
proton |
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neutron |
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electron |
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ion |
A compound is a substance containing two or more different chemical elements bound together by a chemical bond. In ionic compounds, one atom borrows an electron from another atom resulting in two ions (electrically charged atoms) of opposite polarities that then become bonded electrostatically.
Regulation of heart rhythm occurs in:
cerebrum |
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nerves |
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cerebellum |
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medulla |
Part of the brainstem, the medulla is the connection between the brain and the spinal cord. It controls involuntary actions like breathing, swallowing, and heartbeat.