43. 下列哪一種肺癌的特徵是生長快速、具神經內分泌特性，並且常在診斷時已發生轉移？ (A) 表皮樣癌 (B) 腺癌 (C) 小形細胞癌 (D) 大細胞未分化癌

2. What feature of genetic mutations can eventually lead to the evolution of new species? (A) Mutations always produce harmful effects. (B) Mutations never affect protein structure or function. (C) Mutations are not a mechanism through which biological evolution occurs. (D) Mutations produce changes in the DNA sequence of a gene.