| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.80 |
| Score | 0% | 76% |
In the food chain, bacteria and fungi convert the organic matter in the dead bodies of plants and animals into simple nutrients. Bacteria and fungi are:
primary consumers |
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producers |
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decomposers |
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scavengers |
Decomposers (saprotrophs) are organisms such as bacteria and fungi that break down the organic matter in the dead bodies of plants and animals into simple nutrients.
A transition zone between two air masses is called:
boundary |
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thunderstorm |
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front |
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fog |
An air mass is a large body of air that has similar moisture (density) and temperature characteristics. A front is a transition zone between two air masses.
This skeletal system is common in arthropods like insects, spiders, and crustaceans.
vertebrate |
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exoskeleton |
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bone |
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endoskeleton |
An exoskeleton (external skeleton) is common in arthropods like insects, spiders, and crustaceans.
Which of the following indicates the correct reproductive sequence?
ovum → fetus → zygote |
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ovum → zygote → fetus |
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none of these are correct |
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zygote → ovum → fetus |
During intercourse, the penis ejaculates sperm, produced in the testes, into the vagina. Some of the sperm makes their way to the uterus where, if they encounter an egg to fertilize, unite with the ovum to form a fertilized egg or zygote. The zygote then may implant in the uterus and eventually develop into a fetus.
A biological community of interacting organisms and their physical environment is known as:
ecosystem |
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community |
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biome |
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population |
An ecosystem is a biological community of interacting organisms and their physical environment. This includes both the biotic (living) and abiotic (non-living).