| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.52 |
| Score | 0% | 70% |
Which of these is not a recognized blood type?
O |
|
B |
|
AO |
|
AB |
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.
This skeletal system is common in arthropods like insects, spiders, and crustaceans.
vertebrate |
|
endoskeleton |
|
exoskeleton |
|
bone |
An exoskeleton (external skeleton) is common in arthropods like insects, spiders, and crustaceans.
Water freezing or boiling is an example of which of the following?
sublimation |
|
cooling |
|
phase transition |
|
heating |
A substance undergoes a phase transition when it moves from one state of matter to another, for example, when water freezes or boils.
In which type of compound are electrons shared between atoms?
ionic |
|
covalent |
|
chemical |
|
molecular |
A compound is a substance containing two or more different chemical elements bound together by a chemical bond. In covalent compounds, electrons are shared between atoms. In ionic compounds, one atom borrows an electron from another atom resulting in two ions (electrically charged atoms) of opposite polarities that then become bonded electrostatically.
Which of the following temperatures is least like the others?
-273°C |
|
32°F |
|
absolute zero |
|
0K |
Absolute zero is the coldest possible temperature in the universe. In the Kelvin scale, absolute zero is 0K and in the Celsius scale it is -273°C.