Which of the following justifications for using a particular species would not likely be accepted by the IACUC?
A. Reluctance to learn about a new species that might be a better fit.
B. Physiologic characteristics of the species that render it uniquely suited for the proposed
research.
C. The existence of a large body of background data in the literature for that particular species.
D. The availability of species-specific laboratory reagents needed to perform experiments.

Which of these is true of the cytoplasm of an unfertilized egg? a. it is an unevenly distributed mixture of mrna, proteins, organelles, and other substances. b. it does not contain substances that are important in directing development. c. these substances are supplied by the sperm. d. it does not contain substances that are important in directing development. e. development is directed solely by the surrounding cells. f. it is a homogeneous mixture of mrna, proteins, organelles, and other substances. g. it does not contain substances that are important in directing development. h. these substances are produced by the dna of the fertilized zygote.