Question 23

The author mentions 'maize (Zea mays)' primarily to cite a species that differs from its wild progenitor in the size of some of its plant structures.

The mention of maize serves to illustrate how domesticated crops, like maize, have undergone significant changes compared to their wild ancestors, particularly in the size of various plant structures.

A) acknowledge that domesticated crops with certain features likely originated in similar ecosystems

This option is incorrect as the focus of the mention is not on the ecosystems where domesticated crops originated, but rather on the specific morphological differences between maize and its wild progenitor. The emphasis is on the traits of maize itself, rather than the ecological context of its domestication.

B) emphasize that domestication of wild plants has resulted in a wide range of now-common food crops

While domestication is a critical theme, this option does not accurately capture the author's intent in mentioning maize. The primary focus is on the specific changes in maize's physical characteristics rather than a broad statement about domestication leading to diverse crops.

C) cite a species that differs from its wild progenitor in the size of some of its plant structures

This option is correct because it directly addresses the author's purpose in mentioning maize. The author highlights how maize exhibits significant differences in size and structure compared to its wild ancestor, making it a clear example of the effects of domestication.

D) provide evidence that certain traits shared by many domesticated plants are advantageous

Although this option touches on the advantages of traits in domesticated plants, it does not specifically relate to the mention of maize. The author’s focus is on the specific morphological changes in maize rather than making a general statement about the advantages of domesticated traits across various species.

Conclusion

The correct answer, C, accurately reflects the author's intention to highlight the distinctive differences in size and structure between maize and its wild progenitor, illustrating the effects of domestication on specific crops. Other options either misinterpret the author's focus or veer into broader themes that are not directly addressed in the context of maize.