| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.29 |
| Score | 0% | 66% |
What part of the nervous system is responsible for controlling involuntary actions like breathing, swallowing, and heartbeat?
spinal cord |
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cerebrum |
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medulla |
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cerebellum |
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.
A large naturally occurring community of flora and fauna occupying a major habitat is:
a biome |
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a population |
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a food chain |
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a community |
A biome is a large naturally occurring community of flora (plants) and fauna (animals) occupying a major habitat (home or environment).
Which of the following members of the food chain are most alike?
producers and tertiary consumers |
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scavengers and decomposers |
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primary consumers and omnivores |
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herbivores and autotrophs |
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.
In fermentation, what replaces oxygen in anaerobic respiration?
lactic acid or alcohol |
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ascorbic acid or peptides |
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water |
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starches |
If no oxygen is present, cellular respiration is anaerobic and will result in fermentation where either lactic acid or alcohol is used instead of oxygen.
Which of the following is not true about simple magnets?
opposite poles repel each other |
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all of these are untrue |
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same poles repel each other |
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opposite poles attract each other |
Simple magnets have two poles, north and south, and opposite poles attract each other (N attracts S, S attracts N). Likewise, the same pole of two magnets repel (N repels N, S repels S). The Earth has a magnetic field and North and South Poles which enables the use of a magnetic compass to determine direction.