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Question: Throughout much of Europe, there has been a severe decline in the mushroom population. On study plots in Holland, data collected since 1912 indicate that the number of mushroom species has dropped from 37 to 12 per plot in recent years. Along with the reduction in the number of species, there has been a parallel decline in the number of individuals plants; moreover, the surviving plants are smaller. The phenomenon of disappearing mushrooms is also evident in England. One study noted that, in 60 fungus species, 20 exhibited declining populations. Mycologists are also concerned about a decline in US;however,there are no long-term studies, such as those in Europe, to provide evidence for such a decline. Consider the niche of fungi in the ecosystem. How would an ecosystem be affected by a decline in Fungi species?
If you started a PCR protocol with 10 double stranded molecular of DNA, Determine how many double stranded molecules of product would you have after 5 cycles of PCR?
What strategies do other organisms have that allow them to live in environments that are hypertonic to their cytoplasm. What is the pattern in data from Seeley's field experiment.
Explain physiological changes that occur in three different organ systems when food is ingested and how these systems coordinate a response in the human body.
What is Spock's genotype? What is Spock's wife's genotype? What percentage of their offspring would have the similar phenotype as Spock.
What is involved with producing Energy (such as ATP) for muscle contraction. An organelle in the muscle cell that helps distributes the signal to contract by the interior of the cell.
I in brief describe how a mutation might alter gene function (at the molecular level) if it fell into the following categories. As an example, a neomorphic mutation could result from expressing a gene in a novel location.
Trace the pathway this particle would probably take while moving from outside the cell to inside. What organelles will it pass through? Where will it be located within these organelles.
Assume you identify a recessive mutation in the AP endonuclease in yeast. During the diploid phase of their lifecycle, the yeast are viable but haploid strains die rapidly.
Birth control pills maintain a high blood level of estrogen and progesterone. Determine what is happening in the ovary when the blood level of estrogen is high?
Activation of T cells requires that antigens be presented from antigen-presenting cells, not simply by exposure to the antigen in solution. What biological rationale may underlie this requirement - consider both from the perspective of how this can a..
Determine which of the following groups can be involved in hydrophobic interactions?
Use a chi-square test, test whether these two loci show independent assortment? How would you describe the frequency of the progeny genotypes?
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