Apparent magnitude is

a. the brightness of a star compared to our sun
b. the brightness of a star as it appears from the earth without the effect of the atmosphere
c. the brightness of a star as it appears during the day
d. the brightness of a star as it appears in certain telescopes

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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.