| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.17 |
| Score | 0% | 63% |
In cell biology, where does DNA replication take place?
cytoplasm |
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nucleus |
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mitochondria |
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Golgi apparatus |
The cell nucleus contains the genetic material of the cell and is where DNA replication takes place.
Veins __________ blood at __________ pressure.
deoxygenated, low |
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oxygenated, high |
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oxygenated, low |
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deoxygenated, high |
Veins carry blood back to the heart from the body. While arteries are thick-walled because they carry oxygenated blood at high pressure, veins are comparatively thin-walled as they carry low-pressure deoxygenated blood. Like the heart, veins contain valves to prevent blood backflow.
Which of the following is not true about simple magnets?
all of these are untrue |
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same poles repel each other |
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opposite 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.
The heart __________ blood.
deoxygenates |
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oxygenates |
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creates |
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filters |
To provide oxygen to the body, blood flows through the heart in a path formed by the right atrium → right ventricle → lungs → left atrium → left ventricle → body. When blood enters the right side of the heart it is deoxygenated. It enters the left side of the heart oxygenated after traveling to the lungs.
A biological community of interacting organisms and their physical environment is known as:
community |
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population |
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ecosystem |
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biome |
An ecosystem is a biological community of interacting organisms and their physical environment. This includes both the biotic (living) and abiotic (non-living).