A child has a bicycle accident and is rushed to the ER. The doctors stop the bleeding, but the child needs a transfusion. Fortunately, the patient is AB-positive, so the doctors can give him ________
A) AB negative or positive only
B) any blood type
C) O positive only
D) O negative only
B
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The cell membranes of wall-less archaeons are strengthened by ________.
A. pseudomurein B. diglycerol tetraethers C. glycoprotein or protein layers D. diglycerol ethers
Association areas allow us to perform all of the following EXCEPT ____
a. abstract thought b. judgment c. fear arousal d. planning e. concern for others
Where does photosynthesis occur?
What will be an ideal response?
In a frog embryo, gastrulation
A. is impossible because of the large amount of yolk in the egg. B. proceeds by invagination and involution as cells roll over the dorsal lip of the blastopore. C. occurs within the inner cell mass that is embedded in the large amount of yolk. D. produces a blastocoel displaced into the animal hemisphere. E. occurs along the primitive streak in the animal hemisphere.