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:

To determine the correct punctuation, we analyze the sentence structure. The phrase "Jiong Ma — a prominent researcher in the reproductive development and evolution of plants" is an appositive providing additional information about Jiong Ma, and the part "who led a study..." is a relative clause modifying "Jiong Ma". However, looking at the options, we need to check the punctuation for the appositive and the clause. But wait, actually, the correct structure here: the original sentence has "of plants" and then we need to introduce the relative clause. Wait, no, the options are about how to connect "plants" with the rest. Wait, the correct option should be the one that properly sets off the appositive or the relative clause. Wait, no, let's re - examine. The sentence is "Jiong Ma — a prominent researcher in the reproductive development and evolution of ____ led a study...". Wait, no, the user's question is about which choice completes the text. Wait, the options are about the punctuation after "plants". Wait, actually, the correct answer is A? No, wait, no. Wait, the correct usage here: when we have a non - restrictive relative clause (modifying a person, Jiong Ma, but the "of plants" is part of the prepositional phrase. Wait, no, the key is that "Jiong Ma" is a person, and the relative clause "who led a study..." should be introduced with "who" after a comma (for non - restrictive) or a colon/slash? Wait, no, the options: option A is "plants, who" — but "plants" is a noun, and "who" refers to a person. Wait, that can't be. Wait, maybe there's a typo, but looking at the options, the correct answer should be A? No, wait, no. Wait, actually, the correct structure is that "Jiong Ma" is the subject, and "a prominent researcher...of plants" is an appositive, and then "who led a study..." is a relative clause. But "who" should refer to Jiong Ma, not plants. So maybe the options are mis - formatted, but among the options, the only one with a comma and "who" (even though "who" should refer to Jiong Ma, maybe the sentence structure is that "of plants" is part of the appositive, and then "who" starts the relative clause for Jiong Ma). So the correct option is A: plants, who.

Answer:

A. plants, who