4. Include an explanation of how the surface area-to-volume ratio, diffusion rate, and time for substances to reach the center are Related: Support your explanation with data

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.

the answer you are looking for is the united states forest service.

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