Both processes rely on each other to function
Given what we know, we can confirm that the fact that Mannitol salt agar can determine which species of Staphylococcus is present makes it an example of a selective differential medium.
<h3>What is a selective differential medium?</h3>
- This type of medium is very similar to that of a differential medium in that it also allows more than one type of microbe to grow.
- It also allows the user to continue to distinguish between the microbe colonies based on biochemical differences.
- However, in contrast to that of a basic differential medium, this differential medium is also selective in that it controls which type of microbe specifically is allowed to grow.
Therefore, we can confirm that since Mannitol salt agar can determine which species of Staphylococcus is present, it can be considered a differential selective medium because it allows multiple microbes to grow while controlling which types are allowed to grow.
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Answer:
In the mid-1800s, over-hunting of Northern Elephant Seals reduced their population size to fewer than 40 individuals. However, the population has since rebounded to over 100,000 animals. The population went through a _<u>bottle neck event (genetic drift)</u>_, which makes it more susceptible to _<u>developing a genetic disease</u>_.
Explanation:
Genetic drift is the random change that occurs in the allelic frequency of a population through generations. The magnitude of this change is inversely related to the size of the original population. These changes produced by genetic drift accumulate in time. Eventually, some alleles get lost, while some others might set. Genetic drift affects a population and reduces its size dramatically due to a disaster or pressure-bottleneck effect- or because of a population split -founder effect-
. The bottleneck effect most likely affects smaller populations.
In the exposed example, extensive hunting acted as a pressure that reduced the number of Northern elephant seals to fewer than 100. This population experienced one or many generations of small size since these animals were affected by hunting. As the survivors did not have the whole genetic pool of the original population, the <em>population size might have recovered to a current population size of 100,000 individuals</em><em>,</em><em> but the genetic pool might have not</em><em>.</em> When the small population increases in size, it will have a genetically different composition from the original one. In these situations,<em> there is a reduced genetic variability, with a possibility of developing a peculiar allelic component</em>. If the <em>survivors in the population carried or developed a mutation, probably this mutation passed from generation to generation</em>. It will involve <em>more individuals each time and</em><em> increase the probability of developing a genetic disease.</em>
