Which of the following options best describes the author's argument?
Explanation:
As per the first sentence of the second paragraph, modern evolutionary biology is a synthesis of Charles Darwin’s mechanism of natural selection and Gregor Mendel’s discoveries of how genes are inherited. However, the last sentence of the same paragraph also states that this combination of theories is unable to completely explain evolution. Thus only option 1 is true. Hence, the correct answer is option 1.
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