| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.38 |
| Score | 0% | 68% |
__________ and __________ pair to strengthen bones.
vitamin D, calcium |
|
vitamin D, magnesium |
|
iron, calcium |
|
calcium, vitamin A |
Vitamin D helps calcium strengthen bones while also aiding muscle, nerve, and immune system function.
As part of digestion, the liver produces bile which breaks down:
starches |
|
sugars |
|
protein |
|
fat |
The liver produces bile which emulsifies (separates) fat.
The __________ is a system of muscles that allows breathing.
bronchioles |
|
trachea |
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pulmonary |
|
diaphragm |
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.
In the classification of life, which of the following is not a domain?
eukaryota |
|
animalia |
|
bacteria |
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archaea |
The broadest classification of life splits all organisms into three groups called domains. The three domains of life are bacteria, archaea and eukaryota.
When light travels between two substances it bends. This is called:
refraction |
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conduction |
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reflection |
|
convection |
Because different materials have different refractive indices, light changes speed when passing from one material to another. This causes the light to bend (refraction) at an angle that depends on the change in refractive index between the materials. The greater the difference, the higher the angle of refraction.