Which of the following statements is true?

  • A
    In the historic cloning experiment of Dr. Wilmut,the transplanted nucleus was taken from an udder cell.
  • B
    Mammalian characters appeared first in dinosaurs.
  • C
    Heart of mammals is incapable of being in vitro.
  • D
    Pyramid of biomass is upright in pond ecosystem.

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The relationship in an ecosystem can be depicted in

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The number of primary producers within a specified area would be maximum in

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