| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.46 |
| Score | 0% | 69% |
A person's genotype is their genetic makeup and includes:
dominant alleles |
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phenotypes |
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recessive alleles |
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both dominant and recessive alleles |
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.
The crust and lithosphere of the Earth is made up of which of the following?
continents |
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metamorphic rock |
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plates |
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sedimentary rock |
The crust and the rigid lithosphere (upper mantle) is made up approximately thirty separate plates. These plates more very slowly on the slightly more liquid mantle (asthenosphere) beneath them. This movement has resulted in continental drift which is the gradual movement of land masses across Earth's surface. Continental drift is a very slow process, occurring over hundreds of millions of years.
Poor balance could indicate an issue with which part of the nervous system?
cerebrum |
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cerebellum |
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spinal cord |
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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.
The asteroids in the Kuiper belt are composed of which of the following?
gaseous methane, ammonia, and water |
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rock |
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frozen methane, ammonia, and water |
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minerals |
The Kuiper Belt is similar to the asteroid belt but much larger. Extending beyond the orbit of Neptune, it contains objects composed mostly of frozen methane, ammonia, and water. Most notably, the Kuiper Belt is home to Pluto, a dwarf planet that, until a 2006 reclassification, was considered the ninth planet of the solar system.
Water freezing or boiling is an example of which of the following?
cooling |
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sublimation |
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heating |
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phase transition |
A substance undergoes a phase transition when it moves from one state of matter to another, for example, when water freezes or boils.