| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.79 |
| Score | 0% | 76% |
Which of the following is the narrowest classification of life?
domain |
|
family |
|
genus |
|
species |
The narrowest classification of life, species, contains organisms that are so similar that they can only reproduce with others of the same species.
Which of blood component fights infection?
white blood cells |
|
platelets |
|
red blood cells |
|
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 respiratory and circulatory systems are similar in that they:
transport oxygen |
|
deoxygenate blood |
|
transport nutrients |
|
add carbon dioxide |
Like the respiratory system, the circulatory system serves to transport oxygen throughout the body while removing carbon dioxide. In addition, the circulatory system transports nutrients from the digestive system.
These clouds grow upward and can develop into cumulonimbus or thunderstorm clouds.
cirrus clouds |
|
cumulus clouds |
|
stratus clouds |
|
nimbus clouds |
Cumulus clouds are large, puffy, mid-altitude clouds with a flat base and a rounded top. These clouds grow upward and can develop into a cumulonimbus or thunderstorm cloud.
The ozone layer is in which of Earth's atmospheric layers?
stratosphere |
|
thermosphere |
|
mesosphere |
|
troposphere |
The stratosphere is just above the troposphere and is stratified in temperature with warmer layers higher and cooler layers closer to Earth. This increase in temperature is a result of absorption of the Sun's radiation by the ozone layer.