| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.04 |
| Score | 0% | 61% |
A human heart consists of how many chambers?
1 |
|
8 |
|
2 |
|
4 |
The heart is the organ that drives the circulatory system. In humans, it consists of four chambers with two that collect blood called atria and two that pump blood called ventricles. The heart's valves prevent blood pumped out of the ventricles from flowing back into the heart.
Molecules and atoms that are outputs from a chemical reaction are known as which of the following?
products |
|
side effects |
|
reactants |
|
results |
During a chemical reaction molecules and atoms (reactants) are rearranged into new combinations that result in new kinds of atoms or molecules (products).
Convert 5C° to F°.
41 |
|
-23 |
|
37 |
|
27 |
To convert from C° to F° use:
\(F° = {9 \over 5}C° + 32\)
\(F° = {9 \over 5}(5) + 32\)
\(F° = {45 \over 5} + 32\)
\(F° = 9 + 32 = 41\)
In cell biology, where does DNA replication take place?
cytoplasm |
|
Golgi apparatus |
|
nucleus |
|
mitochondria |
The cell nucleus contains the genetic material of the cell and is where DNA replication takes place.
In the food chain, omnivores may be which of the following?
primary or tertiary consumers |
|
secondary consumers or scavengers |
|
secondary or tertiary consumers |
|
primary or secondary consumers |
Secondary or tertiary consumers may be omnivores.