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1. One problem with solving the nutrient pollution problem is that much of the nitrogen and phosphorus entering our water bodies is from non-point sources. This means that there is no particular point at which we can try to control the source of the pollution. When it rains, nitrogen and phosphorus run off of farm fields and into streams, rivers, and lakes. Since these are non-point sources, how can we try to control these pollution sources?
2. Some species are known as "keystone species" in their ecosystems. Many other species and elements of the ecosystem are dependent on the keystone species. The removal of this species has more widespread effects on the ecosystem than the removal of other species would have. There may be some species whose role in the ecosystem is not key. Perhaps the ecosystem would adapt to the absence of that species. However, some of the connections between species are not apparent to us until the species is gone. Once the species has gone extinct, the effects on the ecosystem could be far greater than we had anticipated. What are the keystone species in your ecosystem? What are they? Are they in danger?
A biologist was testing E. coli for thymidine requirement. She found a thy- point mutant and wanted to study reversion to thy+. She grew 20 cultures of the thy- mutant strain and plated them onto 20 plates that contained media
Provide a picture of an erythrocyte in isotonic, hypotonic, and hypertonic states. explain action of different solution on human cell
Horace Jones had a colonoscopy shortly after his 50th birthday, and the gastroenterologist noticed an unusual mass of tissue in the region of the sigmoid colon.
In the process of making yogurt using lactose free milk, what does the bacteria feed on in the absence of lactose in order to make yogurt
q. the paramedics arrived at the emergency room with a 25-year-old male who suffered severe burns to his face and
While visiting a foreign country, you inadvertently drink the water, even though you have been advised not to. You contact an intestinal disease that causes severe diarrhea. How would you expect your condition to affect your blood pH, urine pH and..
In drosophila the gene (vg) for vestigial wing is a recessivelocated at 67.0 units from the left end of the second chromosome.The gene (cn) for cinnabar eyes is also recessive and is located at57.0 units from the left end of the chromosome.
A transcriptional unit of rRNA with strands of nascent rRNA getting progressively larger as they get closer to the end of the unit, a structure that looks much like an arrowhead. What is the significance of the space between the two arrowheads? Pl..
Assume you are a scientist at a genetic testing company. Describe how you would take one approach to testing relatedness between two individuals,
Write a summary of this article. 1-2 paragraphs. Write your opinion and do you agree or not. It is basically a response. 1-2 Paragraphs.
Create a discussion post using the information in the scenario and the information that was read in the assignments, apply it to the scenario, and identify - How does the RN determine if the defense mechanisms are helpful or harmful.
a round pea seed is germinated, and the mature plant is allowed to self-fertilize. it produces some wrinkled seeds. what was the genotype of the original seed? what is the expected proportion of wrinkled seeds produced by the mature plant?
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