| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.26 |
| Score | 0% | 65% |
A large naturally occurring community of flora and fauna occupying a major habitat is:
a population |
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a biome |
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a community |
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a food chain |
A biome is a large naturally occurring community of flora (plants) and fauna (animals) occupying a major habitat (home or environment).
In the heart, blood flows from the right __________ to the lungs then back to the heart via the left __________.
ventricle, atrium |
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atrium, ventricle |
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ventricle, ventricle |
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atrium, atrium |
The two largest veins in the body, the venae cavae, pass blood to the right ventricle which pumps the blood to the lungs through the pulmonary artery. Blood picks up oxygen in the lungs and returns it to the left atrium via the pulmonary vein.
Which of the following is the primary difference between a comet and an asteroid?
asteroids contain frozen water |
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asteroids have a coma |
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comets have an atmosphere |
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comets orbit the Sun |
A comet is a loose collection of ice, dust, and small rocky particles that, in contrast to an asteroid, has an extended atmosphere surrounding the center. When passing close to the Sun, this atmosphere warms and begins to release gases forming a visible coma or tail.
An asteroid belt holds many of the asteroids in our solar system. It is located between the orbits of which planets?
Mars and Jupiter |
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Mercury and Venus |
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Mars and Earth |
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Jupiter and Saturn |
The solar system also contains over a million rocky fragments of at least 1km in diameter called asteroids as well as millions more with smaller diameters. Many of these asteroids are an asteroid belt between the orbits of Mars and Jupiter.
Saturated fats can __________ LDL ("bad") cholesterol while unsaturated fats can __________ it.
decrease, stabilize |
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decrease, raise |
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raise, decrease |
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stabilize, raise |
Saturated fats can raise LDL ("bad") cholesterol while unsaturated fats can decrease it.