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#Question id: 5561


In sea urchins, the "fast block" and the longer lasting "slow block" to polyspermy, respectively, are ________.

#SCPH28 | Zoology
  1. the acrosomal reaction and the formation of egg white

  2. the cortical reaction and the formation of yolk protein

  3. the jelly coat of the egg and the vitelline membrane

  4. membrane depolarization and the cortical reaction


Answer:- Option(s): 4


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a) extreme stem elongation in dwarf plants

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d) decreases in stem thickness

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f) pale green color of the leaves

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Which of the following statements is the best example of a primary lymphoid organ?

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#Question id: 10794

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Which one of the following characteristics of about lignin is incorrect?

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