| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.93 |
| Score | 0% | 79% |
Water freezing or boiling is an example of which of the following?
sublimation |
|
phase transition |
|
cooling |
|
heating |
A substance undergoes a phase transition when it moves from one state of matter to another, for example, when water freezes or boils.
The __________ is a system of muscles that allows breathing.
bronchioles |
|
trachea |
|
diaphragm |
|
pulmonary |
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.
Which of the following is a decomposer?
ferret |
|
pine tree |
|
fungi |
|
mosquito |
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.
Which of these is not a phase in cell division?
anaphase |
|
cytokinesis |
|
megaphase |
|
interphase |
Cell division is the process by which cells replicate genetic material in the nucleus and consists of several phases, beginning with interphase and ending with cytokinesis.
Which of blood component fights infection?
plasma |
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red blood cells |
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white blood cells |
|
platelets |
Blood is created in bone marrow and is made up of cells suspended in liquid plasma. Red blood cells carry oxygen, white blood cells fight infection, and platelets are cell fragments that allow blood to clot.