| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.22 |
| Score | 0% | 64% |
Within DNA, a variety of a particular gene is called a(n):
homozygous |
|
chromosome |
|
heterozygous |
|
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.
During digestion, after proteins are broken down where does the undigested food go next?
small intestine |
|
large intestine |
|
esophagus |
|
stomach |
Food is mixed with gastric acid and pepsin in the stomach to help break down protein.
Which of blood component carries oxygen?
red blood cells |
|
plasma |
|
platelets |
|
white blood cells |
Blood is created in bone marrow and is made up of cells suspended in liquid plasma. Red blood cells carry oxygen, white blood cells fight infection, and platelets are cell fragments that allow blood to clot.
What part of the brain is responsible for the major senses (thinking, hearing, seeing)?
medulla |
|
brainstem |
|
cerebellum |
|
cerebrum |
The cerebrum is the major part of the brain and is responsible for the main senses (thinking, hearing, seeing).
The ozone layer is in which of Earth's atmospheric layers?
mesosphere |
|
stratosphere |
|
thermosphere |
|
troposphere |
The stratosphere is just above the troposphere and is stratified in temperature with warmer layers higher and cooler layers closer to Earth. This increase in temperature is a result of absorption of the Sun's radiation by the ozone layer.