| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.17 |
| Score | 0% | 63% |
The __________ is a system of muscles that allows breathing.
trachea |
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pulmonary |
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diaphragm |
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bronchioles |
The diaphragm is a system of muscles that allows breathing. During inhalation, the diaphragm expands and air rushes in to fill the space created. Then, during exhalation, the diaphragm contracts and forces the air back out.
Water coming to a boil on a stove, ice melting, and steam from a cup of coffee are all examples of which of the following?
radiation |
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convection |
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reflection |
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conduction |
Convection is the transfer of heat by the circulation or movement of the heated parts of a liquid or gas.
In the metric system, what prefix represents 103?
centi |
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mega |
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milli |
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kilo |
Kilo is the metric system prefix for 103.
Elements in the same group in the Periodic Table of the Elements have the same:
number of electrons |
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number of atomic mass units |
|
number of electrons in their outer electron shell |
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number of electron shells |
The columns of the Periodic Table are called groups and all elements in a group have the same number of electrons in their outer electron shell. The group that an element occupies generally determines its chemical properties as the number of outer shell electrons establishes the way it reacts with other elements to form molecules. So, because each element has the same number of electrons in its outer shell, each has similar reactivity.
In a eukaryotic cell, which organelles deal with proteins?
all of these deal with proteins |
|
Golgi apparatus |
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ribosomes |
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endoplasmic reticulum |
The nucleus of a eukaryotic cell contains the genetic material of the cell and is surrounded by cytoplasm which contains many organelles. Ribosomes produce proteins, endoplasmic reticulum helps synthesize proteins and fats, and Golgi apparatus prepares proteins for use.