| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.33 |
| Score | 0% | 67% |
The respiratory and circulatory systems are similar in that they:
transport nutrients |
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deoxygenate blood |
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transport oxygen |
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add carbon dioxide |
Like the respiratory system, the circulatory system serves to transport oxygen throughout the body while removing carbon dioxide. In addition, the circulatory system transports nutrients from the digestive system.
Which of the following is igneous rock?
granite |
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marble |
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shale |
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sandstone |
The Earth's rocks fall into three categories based on how they're formed. Igneous rock (granite, basalt, obsidian) is formed from the hardening of molten rock (lava), sedimentary rock (shale, sandstone, coal) is formed by the gradual despositing and cementing of rock and other debris, and metamorphic rock (marble, slate, quartzite) which is formed when existing rock is altered though pressure, temperature, or chemical processes.
Which of the following is not true about mass and weight?
mass is the amount of matter something has |
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mass depends on the location where it is measured |
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weight is the force exerted on an object by gravity |
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weight depends on the location where it is measured |
Mass is the amount of matter something has while weight is the force exerted on an object's mass by gravity. So, although a person's mass doesn't change when going from the Earth to the Moon, their weight will decrease because the force of the Moon's gravity is much less than that of Earth.
In cell biology, where does DNA replication take place?
nucleus |
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cytoplasm |
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Golgi apparatus |
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mitochondria |
The cell nucleus contains the genetic material of the cell and is where DNA replication takes place.
In the metric system, what prefix represents 103?
mega |
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milli |
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kilo |
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centi |
Kilo is the metric system prefix for 103.