A 65-year-old man with emphysema due to 34 years of cigarette smoking is admitted to hospital due to dyspnea. With further tests the mean pulmonary arterial pressure is determined to be 45 mm Hg at rest. He is hypoxic (PO2 = 49 mm Hg), hypercapnic (85 mm Hg), and slightly acidotic. The cardiovascular and oxygen changes are due to which of the following?

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#Question id: 8915

#Unit 9. Diversity of Life Forms

The number of legs an insect has, the number of vertebrae in a vertebral column, or the number of joints in a digit (such as a finger) are all strongly influenced by

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#Question id: 2289

#Unit 2. Cellular Organization

According to the endosymbiotic theory, which organelles form from engulfing of cyanobacteria  

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#Question id: 19689

#Unit 13. Methods in Biology

Which of the following statements are true about the PR interval?

a. It includes the P wave and the PR segment

b. The beginning of electrical excitation of the atria and the beginning of excitation of the ventricles.

c. Conduction time through the AV node.

d. P wave + PR segment + QRS Complex

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#Question id: 1550

#Unit 4. Cell Communication and Cell Signaling

IL-4 responsible for class switch recombination (CSR) into,

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#Question id: 23910

#General Aptitude

The presence of pneumatophores is seen in: