In order for an ecosystem<span> to be self-</span>sustaining, it must have<span> a continuous flow of energy and be able to recycle materials</span>
<span>Yeast has the most important percentage of adenine with 31.3%, comparing to human which has 30.9% and other species like Streptococcus, Herring, and E.coli.
Generally, the percentage of adenine and thymine are equal, because they are linked together in the DNA, and the guanine and cytosine percentage are equal too. So if we have the percentage of adenine in the DNA of a species, we can figure out the other percentages.</span>
It is a mating in which an individual showing a dominant phenotype is crossed with an individual showing its recessive phenotype. In a test cross, the unknown individual must be of a dominant phenotype because if the phenotype is recessive the genotype will have to be homozygous recessive.
All cells have a cell membrane, cytoplasm, and DNA.
The 10<span>% </span>Rule<span> means that when </span>energy<span> is passed in an ecosystem from one trophic level to the next, only ten percent of the </span>energy<span> will be passed on. An </span>energy pyramid<span> shows the feeding levels of organisms in an ecosystem and gives a visual representation of </span>energy loss<span> at each level.</span>
