| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.61 |
| Score | 0% | 72% |
In the metric system, what prefix represents 10-3?
milli |
|
centi |
|
kilo |
|
mega |
In the metric system, milli is the prefix for 10-3.
Scavengers break down the dead bodies of plants and animals into which of the following?
simple nutrients |
|
carrion |
|
producers |
|
complex carbohydrates |
Like decomposers, scavengers also break down the dead bodies of plants and animals into simple nutrients. The difference is that scavengers operate on much larger refuse and dead animals (carrion). Decomposers then consume the much smaller particles left over by the scavengers.
Water freezing or boiling is an example of which of the following?
heating |
|
sublimation |
|
phase transition |
|
cooling |
A substance undergoes a phase transition when it moves from one state of matter to another, for example, when water freezes or boils.
What part of the food chain serves only as food for other organisms?
secondary consumers |
|
producers |
|
decomposers |
|
primary consumers |
Producers (autotrophs) serve as a food source for other organisms. Typical producers are plants that can make their own food through photosynthesis and certain bacteria that are capable of converting inorganic substances into food through chemosynthesis
Which of these is not a component of blood?
white blood cells |
|
plasma |
|
marrow |
|
red blood cells |
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.