A quantitative trait influenced by four loci, each with two alleles, would be expected to show ________ possible genotypes
A) 81
B) 16
C) 8
D) 256
E) None of these
A
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If current changes in ocean temperature and pH caused a mass extinction of today's reefbuilding organisms,
A. we would see an unprecedented mass extinction, unlike anything the earth has experienced in the past. B. we would see one more in a series of mass extinctions that have wiped out reefs at least 3 times since the first reefs appeared over 500 million years ago. C. we would see one more in a series of mass extinctions that have wiped out reefs at regular intervals – roughly every 10 million years since the first reefs were formed over 500 million years ago. D. we would see the second great mass extinction of reefs; the only previous such extinction took place at the end of the Permian. E. none of these
The class of an antibody is determined by the structure of its
a) antigen-binding site b) constant region c) variable region
What is/are potential outcomes when a virus is phagocytosed and the phagocytic cell presents a small antigen fragment to naïve TH cells in association with Class II MHC molecules?
a) the production of antiviral antibodies b) the proliferation of cytotoxic T cells c) stimulate the production of memory T and B cells d) two of the above e) three of the above
Which of the following is an opportunistic pathogenic fungus in humans?
A. Blastomyces dermatitidis B. Coccidioides immitis C. Candida albicans D. Histoplasma capsulatum E. Paracoccidioides brasiliensis