All of the following regarding "immune privileged sites" are true EXCEPT
A) they include corneal and brain tissue.
B) they do not have lymphatic vessels.
C) they are rarely rejected.
D) they include any tissue transplanted from a pig.
E) they explain how animals tolerate pregnancies without rejecting the fetus.
D
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The early branching angiosperms have ______ diversity than later branching groups
A. more B. less C. the same
Excessive heat or extremes of pH often cause denaturation of proteins, which means that the proteins ____
a. have fallen apart into individual monomer subunits b. are no longer biological molecules c. have broken into many separate domains d. are no longer in a functional three dimensional conformation e. are highly reactive
This form of carbon results from cell respiration.
A) Producers B) Carbon dioxide C) Transpiration D) limestone
The molecule that functions as a corepressor for the trp operon is
A. lactose. B. CAP. C. tryptophan. D. glucose. E. cAMP.