| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.02 |
| Score | 0% | 60% |
Which of the following is not part of the carbon cycle?
respiration |
|
decomposition |
|
photosynthesis |
|
precipitation |
The carbon cycle represents the ciruit of carbon through Earth's ecosystem. Carbon dioxide (CO2) in the atmosphere is absorbed by plants through photosynthesis. Plants then die and release carbon back into the atmosphere during decomposition or are eaten by animals who breathe (respiration) the carbon into the atmosphere they exhale and produce waste which also releases carbon as it decays.
In taxonomy, domains are the broadest classification of life. How many domains are there?
3 |
|
dozens |
|
6 |
|
5 |
The broadest classification of life splits all organisms into three groups called domains. The three domains of life are bacteria, archaea and eukaryota.
Within DNA, a variety of a particular gene is called a(n):
allele |
|
heterozygous |
|
homozygous |
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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.
A dominant trait will be expressed when paired with:
a dominant trait |
|
a chromosome |
|
a gene |
|
a recessive trait |
The traits represented by genes are inherited independently of each other (one from the male and one from the female gamete) and a trait can be dominant or recessive. A dominant trait will be expressed when paired with a recessive trait while two copies of a recessive trait (one from each parent) must be present for the recessive trait to be expressed.
During digestion, after proteins are broken down where does the undigested food go next?
stomach |
|
small intestine |
|
large intestine |
|
esophagus |
Food is mixed with gastric acid and pepsin in the stomach to help break down protein.