| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.22 |
| Score | 0% | 64% |
Which of these does not contain oxygenated blood?
right atrium |
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aorta |
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left ventricle |
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pulmonary vein |
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.
"For every action, there is an equal and opposite reaction." This describes which of Newton's laws of motion?
third |
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fourth |
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second |
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first |
Newton's third law of motion states that For every action, there is an equal and opposite reaction. When an object exerts a force on another object, the second object exerts a force of equal magnitude in the opposite direction on the first object.
As part of digestion, the liver produces bile which breaks down:
protein |
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fat |
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sugars |
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starches |
The liver produces bile which emulsifies (separates) fat.
Traits represented by genes may be which of the following?
expressed |
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recessive |
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dominant |
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all of these |
The traits represented by genes are inherited independently of each other (one from the male and one from the female gamete) and a trait can be dominant or recessive. A dominant trait will be expressed when paired with a recessive trait while two copies of a recessive trait (one from each parent) must be present for the recessive trait to be expressed.
Small rocks shed by asteroids and comets that reach the earth are called:
meteorites |
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meteoroids |
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meteors |
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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.