The transplant of pig bone marrow into a human recipient may overcome the ____________________ triggered by transplanted pig organs
Fill in the blank(s) with correct word
.T cell-mediated rejection
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An important diagnostic sign of measles is
A. Koplik's spots. B. giant cells. C. fever. D. swollen lymph nodes.
In a chemical analysis of an animal tissue sample, which element would be in the least quantity?
A. carbon B. oxygen C. hydrogen D. nitrogen E. iodine
An earthworm detects sound
a. through specialized tympanic membranes located near the head. b. through a thinned region of the exoskeleton. c. through general mechanoreceptors on its skin. d. by using a specialized organ that measures the frequency of vibration of the surrounding dirt particles. e. through a series of mechanoreceptors arranged in a lateral line.
Fluorescence occurs when ____
a. a high-energy electron returns to its ground state by releasing energy in a photon b. a low-energy electron moves to a high-energy state by absorbing heat c. a high-energy electron leaves its nucleus and moves to a different molecule d. a pigment molecule accepts a high energy electron and releases a photon of energy e. the energy from an electron is transferred to a different molecule while the electron returns to the ground state