| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.12 |
| Score | 0% | 62% |
In which type of compound are electrons shared between atoms?
ionic |
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chemical |
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molecular |
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covalent |
A compound is a substance containing two or more different chemical elements bound together by a chemical bond. In covalent compounds, electrons are shared between atoms. In ionic compounds, one atom borrows an electron from another atom resulting in two ions (electrically charged atoms) of opposite polarities that then become bonded electrostatically.
During digestion, after proteins are broken down where does the undigested food go next?
esophagus |
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large intestine |
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stomach |
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small intestine |
Food is mixed with gastric acid and pepsin in the stomach to help break down protein.
Regulation of heart rhythm occurs in:
cerebrum |
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nerves |
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cerebellum |
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medulla |
Part of the brainstem, the medulla is the connection between the brain and the spinal cord. It controls involuntary actions like breathing, swallowing, and heartbeat.
Herbivores are __________ that subsist on producers like plants and fungus.
tertiary consumers |
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scavengers |
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primary consumers |
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secondary consumers |
Primary consumers (herbivores) subsist on producers like plants and fungus. Examples are grasshoppers, cows, and plankton.
Which of the following is the narrowest classification of life?
genus |
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domain |
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species |
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family |
The narrowest classification of life, species, contains organisms that are so similar that they can only reproduce with others of the same species.