| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.01 |
| Score | 0% | 60% |
In the food chain, omnivores may be which of the following?
primary or secondary consumers |
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secondary consumers or scavengers |
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primary or tertiary consumers |
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secondary or tertiary consumers |
Secondary or tertiary consumers may be omnivores.
Which of these parts of digestion takes place in the mouth?
breaking down starches |
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breaking down fats |
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absorbing nutrients |
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breaking down proteins |
Digestion begins in the mouth where the teeth and tongue break down food mechanically through chewing and saliva, via the enzyme salivary amylase, starts to break starches down chemically. From the mouth, food travels down the esophagus where contractions push the food into the stomach.
Respiration is the process by which __________ absorb oxygen and eliminate carbon dioxide.
capillaries |
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bronchioles |
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diaphragms |
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blood cells |
The respiratory system manages respiration which is the process by which blood cells absorb oxygen and eliminate carbon dioxide.
A human heart consists of how many chambers?
1 |
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2 |
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4 |
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8 |
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.
The most diverse kindgom of life is which of the following?
plants |
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fungi |
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animals |
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protists |
Below domain, life is classified into six kingdoms: plants, animals, archaebacteria, eubacteria, and fungi. The last kingdom, protists, include all microscopic organisms that are not bacteria, animals, plants or fungi. (Archaebacteria and eubacteria are sometimes combined into a single kingdom, monera.)