As continents come together to form a supercontinent, a. The ocean that had separated them disappears
b. A giant ocean forms on the outside of the supercontinent
Mountain ranges rise where continental plates converge
d. All of these

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the correct answer is: b. pantala flavescens, because these organisms would have a high level of genetic variation due to sexual reproduction.  

because involves two organisms (parents) whose genetic material combines, sexual reproduction leads to genetic variation in new generations of offspring. the offspring is an unique organism, with new genome, more protected with the higher ability to adapted. this process is fundamental to evolution.