What must happen in order for a donor organ to not be rejected by the recipient?
a. The MHC complexes need to match as closely as possible.
b. The recipient's plasma cells will be inactivated.
c. The recipient's passive immunity pathway will be activated.
d. The NK cells of the recipient will be inactivated.
e. The cytotoxic T cells will be inactivated.
a
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We know that that there are over 50 major phyla in Bacteria; however, only about 25 of these phyla have cultured representatives. Why is this?
How are scientists attempting to culture representative from the 25 phyla that do not currently have any organisms in culture? What will be an ideal response?
The simultaneous use of both organic and inorganic forms of carbon is called ________.
A. metatrophy B. osmotrophy C. omnitrophy D. mixotrophy
A red chemical dye known as phenol red changes to yellow when CO2 is present. A small green plant seedling is placed in phenol red and then placed in the dark. Which of the following is most likely to occur?
a. The solution is yellow to begin with, and it will turn red because photosynthesis is occurring. b. The solution is red to begin with, and it will turn yellow because photosynthesis is occurring. c. The solution is yellow to begin with, and it will turn red because respiration is occurring. d. The solution is red to begin with, and it will turn yellow because respiration is occurring. e. The solution is red to begin with, and it stays red as photosynthesis cannot occur in the dark.
Order __________ includes the snakes
a. Apoda b. Chelonia c. Aves d. Squamata e. Reptilia