| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.00 |
| Score | 0% | 60% |
The respiratory and circulatory systems are similar in that they:
deoxygenate blood |
|
transport oxygen |
|
add carbon dioxide |
|
transport nutrients |
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.
DNA is encoded through a combination of which of the following?
nucleotides |
|
genes |
|
gametes |
|
helix |
Deoxyribonucleic acid (DNA) is the molecule that contains genetic information. DNA is encoded through a combination of nucleotides that bind together in a specific double helix pattern.
What part of the nervous system controls simple reflexes?
spinal cord |
|
medulla |
|
autonomic |
|
cerebrum |
The spinal cord connects the brain to the body's network of nerves. It carries impulses between all organs and the brain and controls simple reflexes.
Which of the following states of matter exists at the lowest temperature?
gas |
|
liquid |
|
solid |
|
none of these |
Solids exist at a lower temperature than liquids which exist at a lower temperature than gases.
Which of the following describes the Earth's outer core?
liquid |
|
makes up most of the Earth's volume |
|
primarily solid |
|
solid |
The Earth's core is divided into the liquid outer core (1,430 miles or 2,300 km radius) and the solid inner core (745 miles or 1,200 km radius).