Introduction to Ecology
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Questions and Answers

What is the basic unit of ecological organization that is the smallest component of any population?

  • Organism (correct)
  • Biosphere
  • Community
  • Population
  • Which level of ecological organization encompasses all the interacting populations in a given area?

  • Community (correct)
  • Population
  • Ecosystem
  • Environment
  • What does an ecosystem involve interactions between?

  • Abiotic and biotic factors (correct)
  • Abiotic factors only
  • Physical factors only
  • Living factors only
  • In what conditions may organisms compete with each other for resources according to the text?

    <p>In all environments with similar needs</p> Signup and view all the answers

    What do autotrophs do in nutritional relationships?

    <p>Synthesize their own food</p> Signup and view all the answers

    Which factor may act as a limiting factor determining the types of organisms in an environment?

    <p>Dry environment of desert regions</p> Signup and view all the answers

    In a symbiotic relationship where one organism benefits and the other is unharmed, what type of symbiosis is it?

    <p>Commensalism</p> Signup and view all the answers

    What do decomposers do in an ecosystem?

    <p>Break down organic wastes and dead organisms</p> Signup and view all the answers

    What determines the species of fish that live in a body of water?

    <p>Amount of available oxygen</p> Signup and view all the answers

    What occurs in a steady state population over several years?

    <p>Population remains relatively constant</p> Signup and view all the answers

    What is the characteristic physical nature of amyloid?

    <p>Nonbranching fibrils, Cross-β-pleated sheet conformation</p> Signup and view all the answers

    Which autoimmune disease is characterized by central necrosis rimmed by palisaded histiocytes in the rheumatoid nodule?

    <p>Rheumatoid Arthritis</p> Signup and view all the answers

    In Hashimoto Thyroiditis, what is the main cause of thyroid epithelial cell depletion and mononuclear inflammatory infiltration?

    <p>Autoantibodies against thyroid antigens</p> Signup and view all the answers

    What is a characteristic feature of Polyarteritis Nodosa (PAN) and other vasculitides?

    <p>Necrotizing inflammation of blood vessel walls</p> Signup and view all the answers

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