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Q. Human impact on the Earth's environment is poignantly demonstrated in Mississippi River drainage into the Gulf of Mexico. Every spring, high levels of nitrogen and phosphorous wash into the river from the Midwestern United States farming region and into the northern Gulf. These nutrients supply a huge algal bloom at the water surface creating a dangerously destructive hypoxia that all but destroys the marine ecosystem.
a) examine cycling of oxygen in the natural marine ecosystem and how this cycle is upset during an algal bloom
b) choose two organisms from two different trophic levels in the marine ecosystem and explain the impact of the algal bloom on their ecology
c) it has been suggested that the hypoxic conditions in the Gulf might be contributing to an increased number of shark attacks along the Texas coast. Explain the thinking behind this suggestion.
Martha is maintaining her current weight by eating 2,500 kcalories per day. To lose 1 pound of fat per week, she would have to decrease her intake to how several kcalories per day. Considering the albedo of various surfaces how might temperatures var..
How can the photosynthesis process be enhanced to fix more CO2 than normal and plant productivity could be increased.
Some proponents argue that the "damage" hypothesis makes more sense from an evolutionary perspective, claiming that it is more advantageous for an organism's defence system to respond to tissue damage than to the mere presence of a foreign microbe. D..
Illustrate one experiment that shows that shh is the critical molecule produced by the inducing tissue referred to in (a). what is the evidence that this tissue regulates the ventral pattern of the neural tube (even before this tissue was known to pr..
State how the amonio acids sequence you obtained from the gene fragment for botana curus compares with the sequence for other three species.
What could be expected phenotypes, and in what number will the y be expected? Suppose no linkage.
Explain especially what happens to DCPIP and why and how. Explain results and purposes of each of the four tubes of solutions where the photosynthetic output of the Hill reaction was measured.
A black guinea pig crossed with an albino guinea pig produce 12 black offspring. While the albino was crossed with a second black animal, 6 blacks and 6 albinos were obtained. What is the best justification for this genetic situation.
Which will you expect to increase significantly from M to G1. What does this tell you about how the cellular information for eye colour is pass on? Describe in detail.
Why can prakaryotes quickly re infect a patient if they are not wiped out? How may this result in the evolution of drug resistant pathogens.
Eastern tent caterpillars live in sizable groups in silk nests, or tents, which they construct in cherry trees. They are among the first insects to become active in the spring, emerging very early in the season-a time while daily temperature fluctuat..
In the procedure of carbon fixation, RuBP attaches CO2 molecule to produce a six carbon molecule, which is then split in two. After phosphorylation and reduction, what more needs to occur in the Calvin cycle.
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