| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.13 |
| Score | 0% | 63% |
In cell biology, what part of the cell contains organelles?
cell membrane |
|
nucleus |
|
cytoplasm |
|
cell wall |
The nucleus of a eukaryotic cell contains the genetic material of the cell and is surrounded by cytoplasm which contains many organelles.
DNA is encoded through a combination of which of the following?
gametes |
|
nucleotides |
|
helix |
|
genes |
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.
An element in the physical state of __________ maintains neither a constant volume nor a constant shape.
solid |
|
gas |
|
plasma |
|
liquid |
The gaseous state occurs at a higher temperature range than the solid and liquid states of the same substance. In this state, molecules flow very freely around each other and will spread out as far as they're able. Gases maintain neither a constant volume nor a constant shape.
The pitch of the siren of an approaching ambulance changes as it approaches you. This is an example of which of the following?
refraction |
|
reflection |
|
sound radiation |
|
Doppler effect |
The Doppler effect occurs when the source or listener (or both) of sound waves is moving. If they're moving closer together, the listener perceives the sound with a higher pitch and, when they're moving apart, the listener perceives the sound with a lower pitch.
Which of the following states of matter exists at the highest temperature?
solid |
|
none of these |
|
liquid |
|
gas |
Solids exist at a lower temperature than liquids which exist at a lower temperature than gases.