| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.10 |
| Score | 0% | 62% |
The two heart chambers that collect blood are called:
aorta |
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valves |
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atria |
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ventricles |
The heart is the organ that drives the circulatory system. In humans, it consists of four chambers with two that collect blood called atria and two that pump blood called ventricles. The heart's valves prevent blood pumped out of the ventricles from flowing back into the heart.
In cell biology, where does DNA replication take place?
Golgi apparatus |
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mitochondria |
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nucleus |
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cytoplasm |
The cell nucleus contains the genetic material of the cell and is where DNA replication takes place.
A subatomic particle that orbits the nucleus of an atom. It carries a negative electric charge. This desribes which of the following?
isotope |
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proton |
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electron |
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neutron |
An electron is a subatomic particle that orbits the nucleus of an atom. It carries a negative electric charge. Generally, an atom has the same number of negative electrons orbiting the nucleus as it does positive protons inside.
A biological community of interacting organisms and their physical environment is known as:
community |
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population |
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ecosystem |
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biome |
An ecosystem is a biological community of interacting organisms and their physical environment. This includes both the biotic (living) and abiotic (non-living).
In the food chain, omnivores may be which of the following?
secondary or tertiary consumers |
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secondary consumers or scavengers |
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primary or secondary consumers |
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primary or tertiary consumers |
Secondary or tertiary consumers may be omnivores.