| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.00 |
| Score | 0% | 60% |
The process of diffusion allows __________ to exchange oxygen, carbon dioxide, nutrients, and waste between blood and the body's cells.
capillaries |
|
arteries |
|
veins |
|
red blood cells |
Capillaries are small thin-walled vessels that permit the exchange of oxygen, carbon dioxide, nutrients, and waste between blood and the body's cells. This process of exchange is called diffusion.
Arteries carry __________ blood at __________ pressure.
oxygenated, low |
|
deoxygenated, low |
|
oxygenated, high |
|
deoxygenated, high |
Veins carry blood back to the heart from the body. While arteries are thick-walled because they carry oxygenated blood at high pressure, veins are comparatively thin-walled as they carry low-pressure deoxygenated blood. Like the heart, veins contain valves to prevent blood backflow.
Herbivores are __________ that subsist on producers like plants and fungus.
scavengers |
|
secondary consumers |
|
primary consumers |
|
tertiary consumers |
Primary consumers (herbivores) subsist on producers like plants and fungus. Examples are grasshoppers, cows, and plankton.
In cell biology, where does DNA replication take place?
Golgi apparatus |
|
cytoplasm |
|
nucleus |
|
mitochondria |
The cell nucleus contains the genetic material of the cell and is where DNA replication takes place.
-40°F is how many °C?
\({40 \over 9}\) |
|
\(-{40 \over 9}\) |
|
-8 |
|
-40 |
The formula to convert from F° to C° is:
\(C° = {5 \over 9} (F° - 32)\)
plugging in our values gives:
\(C° = {5 \over 9} (-40 - 32)\)
\(C° = {5 \over 9} (-72) = {{-72 \times 5} \over 9}\)
\(C° = {-360 \over 9}\)
\(C° = -40\)