| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.24 |
| Score | 0% | 65% |
Earth's troposphere layer is which of the following?
farthest from the surface |
|
coldest |
|
closest to the surface |
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hottest |
The Earth's atmosphere has several layers starting with the troposphere which is closest in proximity to the surface. Containing most of the Earth's breathable air (oxygen and nitrogen), it's a region with warmer temperatures closer to the surface and cooler temperatures farther away which results in the rising and falling air that generates weather.
In the metric system, what prefix represents 103?
mega |
|
milli |
|
kilo |
|
centi |
Kilo is the metric system prefix for 103.
Which of the following members of the food chain are most alike?
scavengers and decomposers |
|
primary consumers and omnivores |
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herbivores and autotrophs |
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producers and tertiary consumers |
Like decomposers, scavengers also break down the dead bodies of plants and animals into simple nutrients. The difference is that scavengers operate on much larger refuse and dead animals (carrion). Decomposers then consume the much smaller particles left over by the scavengers.
Poor balance could indicate an issue with which part of the nervous system?
spinal cord |
|
cerebellum |
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cerebrum |
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medulla |
The cerebellum is a large cluster of nerves at the base of the brain that's responsible for balance, movement, and muscle coordination.
Which of the following describes how a person's genes express themselves in physical characteristics?
phenotype |
|
chromotype |
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genotype |
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DNA |
A person's genotype is their genetic makeup and includes both dominant and recessive alleles. Phenotype is how the genes express themselves in physical characteristics.