Campbell Biology in Focus, Books a la Carte Edition; Modified Mastering Biology with Pearson eText - ValuePack Access Card - for Campbell Biology in Focus (2nd Edition)
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Chapter 36, Problem 6TYU

Which of the following statements is true?

  1. A.    All mammals have menstrual cycles.
  2. B.     The endometrial lining is shed in menstrual cycles but reabsorbed in estrous cycles.
  3. C.     Estrous cycles are more frequent than menstrual cycles.
  4. D.    Ovulation occurs before the endometrium thickens in estrous cycles.
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