The nephron begins in the ____
a. glomerulus
b. loop of Henle
c. cortex
d. ureter
e. medulla
ANSWER: c
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Rett syndrome and homeotic mutations result from mutations in ________.
A) transcription factor genes B) mRNA molecules C) exons D) spliceosomes
While innate immunity is ancient and universal amongst animals, the adaptive immune system is generally considered to be unique to the vertebrates. However, some researchers have suggested, with much controversy, that invertebrates may have a form of adaptive immunity as well. What sort of evidence would be required to fully demonstrate such a claim? (Check all that apply.)
_____ B and T cells _____ CD4 receptors _____ efficacy of vaccination _____ highly variable molecules that can bind various antigens _____ identified cells that are necessary to provide acquired immunity _____ immunoglobulin molecules _____ resistance upon second exposure to a pathogen _____ specific resistance to one strain but not another after exposure _____ thymus gland _____ Toll-like receptors
A tall plant is crossed with a short plant, and the progeny are all intermediate in size between the two parental plants. This could be an example of
A) incomplete dominance. B) polygenic inheritance. C) complete dominance. D) A and B E) B and C
While both parsimony methods and distance methods can be quite effective in inferring evolutionary history, both use tricks of sorts. Compare the assumptions, shortcomings, and methods of each
What will be an ideal response?