| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.53 |
| Score | 0% | 71% |
The gravitational interaction of Earth and the Moon is responsible for which of these?
tides |
|
the northern lights |
|
seasons |
|
day and night cycle |
Tides are caused by the gravitational interaction of Earth and the Moon.
Within DNA, a variety of a particular gene is called a(n):
allele |
|
homozygous |
|
heterozygous |
|
chromosome |
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.
When two air masses meet and neither is displaced, what kind of front is present?
warm |
|
cold |
|
occluded |
|
stationary |
When two air masses meet and neither is displaced, a stationary front is created. Stationary fronts often cause persistent cloudy wet weather.
Materials like metals that transfer heat efficiently are called:
conductors |
|
refractors |
|
insulators |
|
reflectors |
Heat is always transferred from warmer to cooler environments and conduction is the simplest way this transfer can occur. It is accomplished through direct contact between materials and materials like metals that transfer heat efficiently are called conductors while those that conduct heat poorly, such as plastic, are called insulators.
In cell biology, where does DNA replication take place?
Golgi apparatus |
|
nucleus |
|
mitochondria |
|
cytoplasm |
The cell nucleus contains the genetic material of the cell and is where DNA replication takes place.