| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.76 |
| Score | 0% | 55% |
Which of the following is not a characteristic of the Sun?
is composed of hydrogen and helium |
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formed 2.6 billion years ago |
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is a yellow dwarf star |
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makes up over 99% of the mass of the solar system |
The Sun is a G-type main-sequence star (G2V) but is informally known as a yellow dwarf star. Composed of 73% hydrogen and 25% helium, the hot plasma that makes up the Sun reaches 9,900°F (5,505°C) at the surface. It formed approximately 4.6 billion years ago and makes up 99.86% of the mass in the solar system.
In the food chain, omnivores may be which of the following?
primary or tertiary consumers |
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primary or secondary consumers |
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secondary consumers or scavengers |
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secondary or tertiary consumers |
Secondary or tertiary consumers may be omnivores.
Antigens in the blood determine:
blood type |
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Rh factor |
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blood oxygen capacity |
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negative or positive status |
Blood is categorized into four different types (A, B, AB, and O) based on the type of antigens found on the outside of the red blood cells. Additionally, each type can be negative or positive based on whether or not the cells have an antigen called the Rh factor.
In the pancreas, lipase converts fat to:
simple sugars |
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glycerol and fatty acids |
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amino acids |
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complex carbohydrates |
The acids produced by the pancreas contain several enzymes that aid in digestion. Lipase converts fat to glycerol and fatty acids. Pancreatic amylase breaks down complex carbohydrates into simple sugars. Trypsin converts polypeptides (the building blocks of protein) into amino acids.
Respiration is the process by which __________ absorb oxygen and eliminate carbon dioxide.
capillaries |
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bronchioles |
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blood cells |
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diaphragms |
The respiratory system manages respiration which is the process by which blood cells absorb oxygen and eliminate carbon dioxide.