| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.89 |
| Score | 0% | 78% |
Which of the following is a decomposer?
mosquito |
|
pine tree |
|
fungi |
|
ferret |
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 blood component fights infection?
white blood cells |
|
red blood cells |
|
platelets |
|
plasma |
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.
The universal recipient blood type can recieve any other blood type. Which blood type is the universal recipient?
AB |
|
AB-positive |
|
O-negative |
|
O |
Blood transfer is limited by the type and Rh factor of the blood. Someone who has Rh-factor negative blood cannot receive blood with a positive type but a person with Rh-factor positive type blood can receive Rh-negative blood. Type O negative blood is the universal donor because it can be given to a person with any blood type. Type AB positive is the universal recipient meaning someone with this blood type can receive any other type of blood.
The gravitational interaction of Earth and the Moon is responsible for which of these?
tides |
|
seasons |
|
day and night cycle |
|
the northern lights |
Tides are caused by the gravitational interaction of Earth and the Moon.
Which of these is not a recognized blood type?
AO |
|
AB |
|
B |
|
O |
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.