| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.14 |
| Score | 0% | 63% |
In cell biology, where does DNA replication take place?
mitochondria |
|
cytoplasm |
|
Golgi apparatus |
|
nucleus |
The cell nucleus contains the genetic material of the cell and is where DNA replication takes place.
Small rocks shed by asteroids and comets that reach the earth are called:
meteorites |
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meteors |
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meteoroids |
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shooting stars |
Smaller rocks shed by asteroids and comets are called meteoroids. When these rocks reach Earth's atmosphere, they burn up in the mesosphere and become meteors. If a meteor manages to reach the Earth, it is called a meteorite.
Bronchioles, alveolus, and capillaries are vital parts of which bodily system?
digestion |
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circulation |
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respiration |
|
nervous |
The trachea branches into the left and right bronchi which each lead to a lung where the bronchi subdivide into smaller tubes called bronchioles. Each bronchiole ends in a small sac called an alveolus which allows oxygen from the air to enter the bloodstream via tiny blood vessels called capillaries.
Cellular fermentation takes place:
in plant cells |
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anaerobically |
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aerobically |
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in the presence of oxygen |
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.
During digestion, where is digested food absorbed into the blood stream?
pancreas |
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stomach |
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small intestine |
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large intestine |
The small intestine is where most digestion takes place. As food travels along the small intestine it gets broken down completely by enzymes secreted from the walls. These enzymes are produced in the small intestine as well as in the pancreas and liver. After the enzymes break down the food, the resulting substances are then absorbed into the blood via capillaries in the small intestine walls.