| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.77 |
| Score | 0% | 55% |
Within DNA, a variety of a particular gene is called a(n):
allele |
|
homozygous |
|
chromosome |
|
heterozygous |
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.
The two heart chambers that pump blood called:
aorta |
|
atria |
|
ventricles |
|
valves |
The heart is the organ that drives the circulatory system. In humans, it consists of four chambers with two that collect blood called atria and two that pump blood called ventricles. The heart's valves prevent blood pumped out of the ventricles from flowing back into the heart.
Velocity is the rate at which an object changes position. What is the formula for velocity?
\(\vec{v} = { t \over \vec{d} } \) |
|
\(\vec{v} = \vec{d}t \) |
|
\(\vec{v} = { \vec{d} \over t } \) |
|
none of these |
Velocity is the rate at which an object changes position. Rate is measured in time and position is measured in displacement so the formula for velocity becomes \(\vec{v} = { \vec{d} \over t } \)
What part of the brain is responsible for the major senses (thinking, hearing, seeing)?
brainstem |
|
cerebrum |
|
medulla |
|
cerebellum |
The cerebrum is the major part of the brain and is responsible for the main senses (thinking, hearing, seeing).
When the clouds become too saturated with water, the water is released as precipitation in the form of:
rain |
|
snow or ice |
|
ice |
|
snow |
Rising into the atmosphere, the water condenses into clouds. When the clouds become too saturated with water, the water is released as snow or ice precipitation which may warm as it falls to reach Earth as rain.