A) Using your knowledge of how myelination impacts/contributes to the central nervous system, describe what is going on with neurons and the role they play in Multiple Sclerosis (an autoimmune disease where the immune system attacks & destroys myelin) B) A group of scientists are attempting to design a model for Multiple Sclerosis in zebrafish. Sadly, genetic orthologs (genes in different species that evolved from a common ancestral gene by speciation) to Homo sapien Multiple Sclerosis-affiliated genes are unidentifiable in zbrafish. Design &explain, & describe the broad experimental strategy characteristics to make a genetic model for Multiple Sclerosis in the zbrafish & incorporate traits one would utilize in the screening procedure.

the wetland preservation movement began in the u.s. in earnest with the clean water act (cwa) of 1972. although not specifically written to protect wetlands, the cwa is comprised of a series of regulations designed to prevent pollutants from contaminating u.s. waters.

oxygen is the first element in group 16 (via) of the periodic table. the periodic table is a chart that shows how chemical elements are related to each other. the elements in group 16 are said to belong to the chalcogen family. other elements in this group include  sulfur, selenium, tellurium,  and  polonium.  the name chalcogen comes from the greek word  chalkos,  meaning "ore." the first two members of the family, oxygen and sulfur, are found in most ores.

oxygen is by far the most abundant element in the earth's crust. nearly half of all the atoms in the earth are oxygen atoms. oxygen also makes up about one-fifth of the earth's atmosphere. nearly 90 percent of the weight of the oceans is due to oxygen. in addition, oxygen is thought to be the third most abundant element in the universe and in the solar system.