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There is no in:

  1. A
    Mature
  2. B
    A mature spermatozoan
  3. C
    Hair root
  4. D
    An enucleated ovum

Solution & Step-by-step Explanation

Mature mammalian red blood cells () lack a nucleus and most organelles (including mitochondria) to maximize space for hemoglobin. Since they lack these components, they contain no .

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There is no in:
A
Mature
B
A mature spermatozoan
C
Hair root
D
An enucleated ovum

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