Over the past 12 weeks, a 75-year-old man with a moderate aortic stenosis has developed shortness of breath and chest pains during exertion. He appears pale. Test of his stool for blood is positive. Laboratory studies show the following: hemoglobin 7.2 g/dL, and mean corpuscular volume 75. A blood smear shows microcytic, hypochromic erythrocytes. Which of the following is the most likely diagnosis?

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#Question id: 3432

#SCPH28 | Zoology

Which of the following statements is (are) true of fixed action patterns?

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#Question id: 5542

#SCPH01 Biochemistry

One stage of cleavage is the morula stage which is:

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#Question id: 15605

#SCPH06 I Botany

The uptake of plasmid DNA into Streptomyces protoplasts is enhanced by 

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#Question id: 11668

#SCPH28 | Zoology

The transfer of fluid from the glomerulus to Bowman's capsule ________.

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#Question id: 15715

#SCPH01 Biochemistry

In embryogenesis a type of structure with no vascular connection with the maternal callus tissue or explants is formed