| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.66 |
| Score | 0% | 73% |
Which of the following describes how a person's genes express themselves in physical characteristics?
DNA |
|
genotype |
|
chromotype |
|
phenotype |
A person's genotype is their genetic makeup and includes both dominant and recessive alleles. Phenotype is how the genes express themselves in physical characteristics.
Carbohydrates are found in:
vegetable oils |
|
sugars and starches |
|
food additives |
|
animal sources |
Carbohydrates are major sources of energy for the body and are found in sugars (fruit, cane sugar, beets) and starches (bread, rice, potatoes, pasta).
Leafy vegetables, beans, potatoes, fruits, and whole grains are good sources of:
protein |
|
unsaturated fat |
|
saturated fat |
|
fiber |
Fiber provides bulk to help the large intestine carry away waste. Good sources of fiber are leafy vegetables, beans, potatoes, fruits, and whole grains.
Which of the following does not represent the freezing point of water?
273K |
|
0°F |
|
32°F |
|
0°C |
The Fahrenheit scale fixes the freezing point of water at 32°F, the Celsuis scale at 0°C, and the Kelvin scale at 273K.
Which of the following is not true of light waves?
travel faster than sound waves |
|
can travel through a vacuum |
|
are mechanical waves |
|
are electromagnetic waves |
Unlike mechanical sound waves that require a physical medium for propagation, light waves are electromagnetic and can travel through empty space. Light waves are also much faster, travelling at 186,000 m/s vs. 343 m/s for sound waves.