Which of the following are organs of the immune system? (Check all that apply.)
_____ red bone marrow
_____ spleen
_____ thymus
_____ thyroid
_____ tonsils
__X__ red bone marrow
__X__ spleen
__X__ thymus
_____ thyroid
__X__ tonsils
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The stroma of the land-plant chloroplast is evolutionarily derived from __________
A. the thylakoid membrane B. the plasma membrane of cyanobacteria C. the periplasm of cyanobacteria D. the cytoplasm of cyanobacteria E. the plasma membrane of a eukaryotic ancestor
The respiratory pigment you would find in a blue crab or octopus is
A. hemocyanin. B. hemoglobin. C. hemophilin. D. ferritin. E. calmodulin.
A couple in which the woman is homozygous dominant for clotting ability and the man has hemophilia A willproduce:a
carrier daughters and affected sons. b. affected daughters and affected sons. c. carrier daughters and normal sons. d. normal daughters and normal sons. e. offspring of unknown genotype for this gene.
What is the minimum number of phage that can initiate the development of a plaque in a bacterial lawn?
A. 1 B. 5 C. 25 D. 10