| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.63 |
| Score | 0% | 73% |
Which of the following is not true of light waves?
can travel through a vacuum |
|
are electromagnetic waves |
|
travel faster than sound waves |
|
are mechanical 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.
Which of these is not a recognized blood type?
B |
|
O |
|
AB |
|
AO |
Blood is categorized into four different types (A, B, AB, and O) based on the type of antigens found on the outside of the red blood cells. Additionally, each type can be negative or positive based on whether or not the cells have an antigen called the Rh factor.
Which of these is not a type of fat?
saturated |
|
polyunsaturated |
|
monounsaturated |
|
cholesterol |
Fats come in three types, saturated (meats, shellfish, eggs, milk), monounsaturated (olives, almonds, avocados), and polyunsaturated (vegetable oils).
The gravitational interaction of Earth and the Moon is responsible for which of these?
seasons |
|
day and night cycle |
|
tides |
|
the northern lights |
Tides are caused by the gravitational interaction of Earth and the Moon.
Within DNA, a variety of a particular gene is called a(n):
heterozygous |
|
chromosome |
|
homozygous |
|
allele |
The gene is the base unit of inheritance and is contained within DNA. A gene may come in several varieties (alleles) and there are a pair of alleles for every gene. If the alleles are alike, a person is homozygous for that gene. If the alleles are different, heterozygous.