What was an important belief in the world at the time of Darwin’s upbringing

It represents religious beliefs on the nature of life. Whereas he saw religion as a tribal strategy of survival, Darwin always believed that he was God's ultimate legislator, and he then remembered that he was convinced that God was a first cause and that he was called a theist at that time.

Explanation:

It represents religious beliefs on the nature of life. Whereas he saw religion as a tribal strategy of survival, Darwin always believed that he was God's ultimate legislator, and he then remembered that he was convinced that God was a first cause and that he was called a theist at that time.

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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.