The descending limb of the loop of Henle is impermeable to water so no passive diffusion occurs
Indicate whether the statement is true or false
FALSE
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The number of major histocompatability (MHC) protein combinations possible in a given population is enormous. However, an individual in that diverse population has a far more limited array of MHC molecules because _____
A) the MHC proteins are made from several different gene regions that are capable of rearranging in a number of ways B) MHC proteins from one individual can only be of class I or class II C) each of the MHC genes has a large number of alleles, but each individual only inherits two for each gene D) once a B cell has matured in the bone marrow, it is limited to two MHC response categories E) once a T cell has matured in the thymus, it can only respond to two MHC categories
The standard state of dilute aqueous solutions is at a temperature of ________°C (298 K), ________ atmosphere(s) of pressure, and with products and reactants present in concentration of ________ mol/L.
Fill in the blank(s) with the appropriate word(s).
Natural selection acts upon the ____ to create microevolutionary change
a. alleles in the gene pool of a population b. genotypic frequencies of a population c. alleles of an individual organism d. allele frequencies in a population e. phenotype of an individual organism
A(n) ________ vaccine to prevent cervical cancer was recently developed
A) attenuated B) combination C) inactivated whole D) recombinant E) toxoid