| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.33 |
| Score | 0% | 67% |
In cell biology, what part of the cell contains organelles?
cell membrane |
|
cell wall |
|
cytoplasm |
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nucleus |
The nucleus of a eukaryotic cell contains the genetic material of the cell and is surrounded by cytoplasm which contains many organelles.
Which of these is matter than cannot be separated into different types of matter by ordinary chemical methods?
compound |
|
molecule |
|
atom |
|
element |
An element is matter than cannot be separated into different types of matter by ordinary chemical methods.
Vector quantities are fully described by which of the following?
a direction only |
|
a magnitude only |
|
a magnitude and a direction |
|
a direction and a polarity |
Velocity and displacement are vector quantities which means each is fully described by both a magnitude and a direction. In contrast, scalar quantities are quantities that are fully described by a magnitude only. A variable indicating a vector quantity will often be shown with an arrow symbol: \(\vec{v}\)
212°F is how many °C?
\(135 {5 \over 9}\) |
|
0 |
|
100 |
|
-100 |
The formula to convert from F° to C° is:
\(C° = {5 \over 9} (F° - 32)\)
plugging in our values gives:
\(C° = {5 \over 9} (212 - 32)\)
\(C° = {5 \over 9} (180) = {{180 \times 5} \over 9}\)
\(C° = {900 \over 9}\)
\(C° = 100\)
Food is mixed with gastric acid and pepsin in the __________ to help break down protein.
large intestine |
|
mouth |
|
stomach |
|
small intestine |
Food is mixed with gastric acid and pepsin in the stomach to help break down protein.