| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.82 |
| Score | 0% | 76% |
Menstruation occurs when:
the fetus is formed |
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the ovum becomes fertilized |
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the ovum fails to become fertilized |
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the zygote is formed |
If the ovum fails to become fertilized, the lining of the uterus sloughs off during menstruation. From puberty to menopause, this cycle of menstruation repeats monthly (except during pregnancy).
What is a major difference between the somatic and autonomic nervous systems?
one is inherited, the other is learned |
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one controls thinking, the other controls feeling |
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one controls voluntary activity, one controls involuntary activity |
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each belongs to a different nervous system |
Both are part of the peripheral nervous system. The somatic nervous system sends sensory information to the central nervous system and controls voluntary actions while the autonomic nervous system regulates involuntary activity in the heart, stomach, and intestines.
Which of the following is not one of the outer planets?
Uranus |
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Jupiter |
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Neptune |
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Venus |
In contrast to the solid terrestrial planets, the outer planets (Jupiter, Saturn, Uranus, and Neptune) consist of hydrogen and helium gas and water.
An endoskeleton (internal skeleton) is a charateristic of __________ animals, including humans.
sentient |
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vertebrate |
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spiny |
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arthropod |
An endoskeleton (internal skeleton) is a charateristic of vertebrate animals, including humans.
In cell biology, where does DNA replication take place?
Golgi apparatus |
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mitochondria |
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cytoplasm |
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nucleus |
The cell nucleus contains the genetic material of the cell and is where DNA replication takes place.