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Expression of Ideas / Rhetorical Synthesis Difficulty: Medium

While researching a topic, a student has taken the following notes:

Chromosomes are cellular structures that contain genes.
Genes carry critical instructions for determining an organism’s physical traits.
Members of the same species typically have the same number of chromosomes.
The pineapple (Ananas comosus) and the melon (Cucumis melo) are species of fruits.
The pineapple has fifty chromosomes.
The melon has twenty-four chromosomes.

The student wants to specify how many chromosomes the pineapple has. Which choice most effectively uses relevant information from the notes to accomplish this goal?

The pineapple’s chromosomes contain genes, which are critical to determining an organism’s physical traits.

The pineapple (Ananas comosus) has fifty chromosomes.

The pineapple (Ananas comosus) and the melon (Cucumis melo) both have chromosomes, but the pineapple has more than the melon does.

The melon, a species of fruit, has twenty-four structures called chromosomes.

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Explanation

Choice B is the best answer. The sentence directly specifies how many chromosomes the pineapple has, as indicated in the notes: fifty.

Choice A is incorrect. While the sentence mentions the pineapple’s chromosomes, it doesn’t specify how many it has. Choice C is incorrect. The sentence indicates that the pineapple has more chromosomes than the melon; it doesn’t specify the exact number of chromosomes the pineapple has. Choice D is incorrect. The sentence specifies how many chromosomes the melon has, not how many the pineapple has.