| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.26 |
| Score | 0% | 65% |
During digestion, after proteins are broken down where does the undigested food go next?
large intestine |
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stomach |
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esophagus |
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small intestine |
Food is mixed with gastric acid and pepsin in the stomach to help break down protein.
Which of the following is related to the Cambrian Explosion?
first civilizations |
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fossil record |
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carbon dating |
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extinction of dinosaurs |
The Cambrian period is one of the most significant geological time periods. Lasting about 53 million years, it marked a dramatic burst of changes in life on Earth known as the Cambrian Explosion. It is from this period that the majority of the history of life on Earth, as documented by fossils, is found. Called the fossil record, the layering of these mineralized imprints of organisms preserved in sedementary rock have allowed geologists to build a historical record of plant and animal life on Earth.
A biological community of interacting organisms and their physical environment is known as:
population |
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ecosystem |
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community |
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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).
Elements that belong to the same period in the Periodic Table of the Elements have the same number of:
electrons |
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protons |
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electron shells |
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atomic mass units |
The rows of the Periodic Table are called periods and contain elements that have the same number of electron shells ordered from lower to higher atomic number.
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:
scavengers |
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decomposers |
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producers |
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primary consumers |
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.