| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.27 |
| Score | 0% | 65% |
Poor balance could indicate an issue with which part of the nervous system?
medulla |
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spinal cord |
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cerebrum |
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cerebellum |
The cerebellum is a large cluster of nerves at the base of the brain that's responsible for balance, movement, and muscle coordination.
Generally, an atom has __________ negative electrons orbiting the nucleus as it does positive protons inside.
more |
|
double the number of |
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fewer |
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equal numbers of |
An electron is a subatomic particle that orbits the nucleus of an atom. It carries a negative electric charge. Generally, an atom has the same number of negative electrons orbiting the nucleus as it does positive protons inside.
Blood is delivered to bodily tissues through:
arterioles |
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veins |
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capillaries |
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plasma |
The aorta is the body's largest artery and receives blood from the pulmonary vein via the left ventricle. From there, blood is circulated through the rest of the body through smaller arteries called arterioles that branch out from the heart. Finally, blood is delivered to bodily tissues through capillaries.
The hottest of Earth's atmospheric layers is which of the following?
stratosphere |
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troposphere |
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mesosphere |
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thermosphere |
Temperatures again increase with altitude in the thermosphere which is the hottest (4,530 °F / 2,500 °C) atmospheric layer due to direct exposure to the Sun's radiation. However, the gas in this layer is highly diluted so even though the atoms of gas may be very high in temperature, there are too few of them to effectively transfer much heat.
A dominant trait will be expressed when paired with:
a gene |
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a recessive trait |
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a dominant trait |
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a chromosome |
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.