| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.00 |
| Score | 0% | 60% |
Which is the proper order of Earth's atmospheric layers from the surface up to space?
thermosphere, mesosphere, stratosphere, troposphere |
|
mesosphere, thermosphere, stratosphere, troposphere |
|
troposphere, stratosphere, mesosphere, thermosphere |
|
stratosphere, troposphere, mesosphere, thermosphere |
The troposphere is the closest layer to Earth, followed by the stratosphere, mesosphere, and finally the thermosphere which borders space.
Which of Earth's layers has weather?
stratosphere |
|
mesosphere |
|
thermosphere |
|
troposphere |
The Earth's atmosphere has several layers starting with the troposphere which is closest in proximity to the surface. Containing most of the Earth's breathable air (oxygen and nitrogen), it's a region with warmer temperatures closer to the surface and cooler temperatures farther away which results in the rising and falling air that generates weather.
DNA is encoded through a combination of which of the following?
genes |
|
gametes |
|
nucleotides |
|
helix |
Deoxyribonucleic acid (DNA) is the molecule that contains genetic information. DNA is encoded through a combination of nucleotides that bind together in a specific double helix pattern.
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.
Food is mixed with gastric acid and pepsin in the __________ to help break down protein.
mouth |
|
stomach |
|
small intestine |
|
large intestine |
Food is mixed with gastric acid and pepsin in the stomach to help break down protein.