Darwin failed to provide an explanation for which of the following?

  • A
    Survival of the fittest
  • B
    Competition
  • C
    Variation
  • D
    High reproduction rate

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According to Neo-Darwinism,which of the following is responsible for evolution?

State the factors affecting the process of speciation.

Hybrid breakdown refers to the condition where the $F_2$ generation or subsequent generations of a hybrid cross are physiologically inferior or less viable compared to the $F_1$ generation.

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