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while species in the sunflower family typically present radial symmetry…

Question

while species in the sunflower family typically present radial symmetry, where each petal grows in virtually identical form from a central axis, hong ma—a prominent researcher in the reproductive development and evolution of ______ led a study that indicated bilateral symmetry has emerged in some sunflower plants through convergent evolution.
which choice completes the text so that it conforms to the conventions of standard english?
choose 1 answer
a plants, who
b plants—who
c plants;
d plants—

Explanation:

Brief Explanations

En este caso, se requiere una puntuación que introduzca una cláusula relativa explicativa. La puntuación correcta es el guion (-), ya que se utiliza para introducir una aclaración o definición. Las opciones A y B usan comas y guiones seguidos de "who", lo cual no es correcto gramaticalmente. La opción C usa un punto y coma, que no es adecuado para este contexto.

Answer:

B. plants—who