Biology

Review China’s population policy on the following Website. http://maps.unomaha.edu/Peterson/funda/Sidebar/ChinaPop.html How do you feel about this policy? What types of benefits and downfalls could you see happening with this type of policy? What impacts could it have on the population both scientifically and socially? Do you think a policy such as this would ever be passed in the United States?

Ecosystem

In an ecosystem, interaction occurs between communities. Energy is transferred from one organism to another through the food chain. What are the three trophic levels? Give an example of each. What trophic level do you think is the most important in the ecosystem and why? What is biodiversity? Is it important? Relate biodiversity to the trophic levels. What would happen to the rest of the trophic levels if one them was wiped out?

How ecological communities and food webs interact.

Give an example of how ecological communities and food webs interact.

Advance a simple, brief hypothesis about what causes histamine release from mast cells that is consistent with all the data.

Mast cells contain granules of histamine which are released upon exposure to allergens. Depending upon location and amount, this histamine-release can cause everything from watery eyes to life-threatening bronchospasm. It was long thought that this might have an immunologic basis. To probe this possibility, an investigator generated DNP-specific antibodies of different isotypes. He then added these antibodies to cultures of mast cells with DNP-coated latex beads or plain latex beads (See attached) What conclusions do you draw these data? Explain your reasoning. Advance a simple, brief hypothesis about what causes histamine release from mast cells that is consistent with all ... click for more

q4 need concise answers

4. An investigator performed cytofluorimetric (FACS) analyses of a mouse strain called C.B20 and a spontaneously arising point mutant that arose in the same strain called "C.B20 scid." Splenocytes from each strain were stained with anti-IgM (green) and anti-CD3 (red), then analyzed. The proportion of cells falling into each phenotypic category defined by these markers were then assessed. *(See Attached) The table below shows the results from all possible donor-recipient combinations of skin grafts between C.B20, C.B20 scid and another, genetically disparate strain called C57BL. Each kind of graft was done on ten mice. *(See Attached) • From the first table, what do you conclu... click for more