| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.15 |
| Score | 0% | 63% |
Absolute zero is which of the following?
the freezing point of oxygen |
|
0°C |
|
the freezing point of hydrogen |
|
the coldest temperature possible in the universe |
In contrast to the Celsius scale (measured in degrees centigrade) that fixes 0° at the freezing point of water and the Fahrenheit scale that uses 32°, the Kelvin scale fixes 0 at absolute zero (-273°C) which is the lowest temperature possible in the universe.
In taxonomy, domains are the broadest classification of life. How many domains are there?
3 |
|
6 |
|
5 |
|
dozens |
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):
chromosome |
|
heterozygous |
|
allele |
|
homozygous |
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.
Which of these is not a phase in cell division?
anaphase |
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cytokinesis |
|
interphase |
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megaphase |
Cell division is the process by which cells replicate genetic material in the nucleus and consists of several phases, beginning with interphase and ending with cytokinesis.
Heredity is the passing on of physical or mental characteristics genetically from one __________ to another.
family |
|
generation |
|
cell |
|
species |
Heredity is the passing on of physical or mental characteristics genetically from one generation to another. Heredity is made possible via large strings of chromosomes which carry information encoded in genes.