Question

44According to the information in the article, Kartik Sunagar and Yehu MoranA v/ere the first scientists to concentrate their venom studies exclusively on ancient animal groups rather than on comparatively young animal groups.B v/ere the first scientists to observe that venoms produced by ancient animal groups are more potent and complex than those produced by new animal groups.C v/ere the first scientists to discover that the venoms of snakes and cone snails evolve through positive selection.D have proposed that negative selection is a more powerful and more prevalent evolutionary force than positive selection.E have proposed that the evolution of animal venom is better explained through the "two-speed" model than though the arms race analogy.

Answer 1

No último parágrafo, os cientistas Sunagar e Moran descrevem o que eles chamam de "two-speed", que é o modelo que eles acreditam que os venenos dos animais de desenvolvem. Nesse modelo, os animais ancestrais sofrem pouquíssimas mudanças em seus venenos, enquanto que os animais mais jovens sofrem constantes mudanças, de forma a se adaptar ao habitat. Portanto, a alternativa correta é a letra E, que diz que os cientistas propõem que a evolução do veneno nos animais é explicada pela teoria two-speed.