| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.61 |
| Score | 0% | 72% |
Which of the following is the narrowest classification of life?
domain |
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species |
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genus |
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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.
Molecules and atoms that are inputs to a chemical reaction are known as which of the following?
fuel |
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products |
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reactants |
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components |
During a chemical reaction molecules and atoms (reactants) are rearranged into new combinations that result in new kinds of atoms or molecules (products).
What part of the brain is responsible for for balance, movement, and muscle coordination?
cerebrum |
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medulla |
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brainstem |
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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.
Bronchioles, alveolus, and capillaries are vital parts of which bodily system?
respiration |
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nervous |
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digestion |
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circulation |
The trachea branches into the left and right bronchi which each lead to a lung where the bronchi subdivide into smaller tubes called bronchioles. Each bronchiole ends in a small sac called an alveolus which allows oxygen from the air to enter the bloodstream via tiny blood vessels called capillaries.
The respiratory and circulatory systems are similar in that they:
add carbon dioxide |
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transport oxygen |
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deoxygenate blood |
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transport nutrients |
Like the respiratory system, the circulatory system serves to transport oxygen throughout the body while removing carbon dioxide. In addition, the circulatory system transports nutrients from the digestive system.