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What is common between parrot, and kangaroo?

A
Homeothermy

B
Toothless jaws

C
Functional post-anal tail

D
Oviparity

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Parrot (birds), and kangaroo (both mammals) are homeothermic animals.
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John is a longtime patient in the practice where you work. Normally, he comes in once a year for a routine physical, but lately (the last six months) he has been in three times, complaining of extreme fatigue and weight loss (he has lost 15 pounds over the last seven months). The attending physician ordered a standard ELISA-type human immunodeficiency virus (HIV) test, which came back negative. This was in January. He was supposed to come back in May for a repeat test, but he was back one month later with a severe case of genital herpes lesions that had not healed after three weeks. The herpes eventually subsided, and he returned in May for a repeat HIV test. At this time, he told the doctor that he was recovering from a severe respiratory infection that he had been fighting for weeks. After more blood work, the physician noted that his ELISA HIV results were negative again. His CD4 count was 200 cells/mm³. Two months later John was admitted to the hospital and a lung biopsy showed that he had Pneumocystis carinii; another HIV test was negative. He was released three weeks later, but after two months he was admitted again with the same infection. Another HIV test revealed negative results. Three days later he died.
  1. What is an ELISA test, and what does the one for HIV actually detect?
  2. John did indeed have an HIV infection, but continued to test negative. What are the possible explanations for the consistently negative results? (hint: it is not seroconversion)
  3. Are there any alternative tests available for clinicians to test patients that they suspect are HIV-positive yet who test negative with normal HIV tests? Describe at least two different alternative tests.
  4. Would you expect patients with a lack of serum reactivity (few to no antibodies) to have a fast or slow progression from HIV infection to full-blown acquired immune deficiency syndrome (AIDS)? Defend your answer.
  5. Which of John's reported symptoms are consistent with a diagnosis of HIV?
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Question Text
What is common between parrot, and kangaroo?
Updated OnFeb 11, 2023
TopicAnimal Kingdom
SubjectBiology
ClassClass 11
Answer TypeText solution:1 Video solution: 2
Upvotes251
Avg. Video Duration2 min