| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.68 |
| Score | 0% | 54% |
Which part of the respiratory system helps protect against infection?
nasal cavity |
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pharynx |
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epiglottis |
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trachea |
After air enters through the nose, it passes through the nasal cavity which filters, moistens, and warms it. Further filtering takes place in the pharynx, which also helps protect against infection, and then in the trachea which is just past the epiglottis, responsible for preventing food from entering the airway.
In cell biology, cytokinesis results in two separate:
cells |
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nuclei |
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chromatids |
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chromosomes |
During cell division, the cytokinesis phase occurs when cytoplasm and cell membranes complete their separation resulting in two separate cells.
In the food chain, omnivores may be which of the following?
primary or secondary consumers |
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secondary or tertiary consumers |
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secondary consumers or scavengers |
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primary or tertiary consumers |
Secondary or tertiary consumers may be omnivores.
The rows of the Periodic Table of the Elements are called:
shells |
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families |
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groups |
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periods |
The rows of the Periodic Table are called periods and contain elements that have the same number of electron shells ordered from lower to higher atomic number.
Universal donor blood can be given to a person with any blood type. Which blood type is the universal donor?
O |
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O-positive |
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O-negative |
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AB |
Blood transfer is limited by the type and Rh factor of the blood. Someone who has Rh-factor negative blood cannot receive blood with a positive type but a person with Rh-factor positive type blood can receive Rh-negative blood. Type O negative blood is the universal donor because it can be given to a person with any blood type. Type AB positive is the universal recipient meaning someone with this blood type can receive any other type of blood.