Which of the following statements is true? Geographic isolation is the main cause of speciation. Hybrid organisms always produce sterile offspring. If a population is spread out over too large area, they

Which of the following statements is true?

Geographic isolation is the main cause of speciation.
Hybrid organisms always produce sterile offspring.
If a population is spread out over too large area, they may become extinct.
Speciation can only happen when a population has very low genetic diversity.

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