| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.89 |
| Score | 0% | 58% |
In the food chain, omnivores may be which of the following?
secondary or tertiary consumers |
|
primary or tertiary consumers |
|
primary or secondary consumers |
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secondary consumers or scavengers |
Secondary or tertiary consumers may be omnivores.
What part of the nervous system controls simple reflexes?
spinal cord |
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autonomic |
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cerebrum |
|
medulla |
The spinal cord connects the brain to the body's network of nerves. It carries impulses between all organs and the brain and controls simple reflexes.
Which part of the respiratory system helps protect against infection?
nasal cavity |
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trachea |
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pharynx |
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epiglottis |
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.
Which of the following is not a terrestrial planet?
Earth |
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Jupiter |
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Venus |
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Mercury |
The four planets closest to the Sun (Mercury, Venus, Earth, and Mars) are called terrestrial (Earth-like) planets because, like the Earth, they're solid with inner metal cores covered by rocky surfaces.
During digestion, where is digested food absorbed into the blood stream?
large intestine |
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pancreas |
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small intestine |
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stomach |
The small intestine is where most digestion takes place. As food travels along the small intestine it gets broken down completely by enzymes secreted from the walls. These enzymes are produced in the small intestine as well as in the pancreas and liver. After the enzymes break down the food, the resulting substances are then absorbed into the blood via capillaries in the small intestine walls.