Study on the flySATReading and WritingCommand of Textual Evidence

Reading and Writing

Command of Textual Evidence — SAT practice questions

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What this topic is

Two kinds of question fall under Command of Textual Evidence.

In one, a claim about a poem, novel or article is stated and the choices are quotations from that work; the task is to find the quotation that most directly illustrates that exact claim. The other describes a researcher's hypothesis, offers possible findings, and asks which would most strongly support or weaken it.

Weaken questions are easily misread as asking for support. Evidence merely related to the topic is not enough; it must bear directly on the specific relationship the hypothesis proposes.

Sample questions

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Question 1Easier

Historian Amira Cole argues that the labels on early botanical specimens did more than identify plants: because collectors repeatedly revised the labels as classifications changed, the labels also preserve evidence of scientific disagreement over time.

Which quotation from Cole’s article most effectively illustrates the claim?

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Answer: C — “On some sheets, one species name is crossed out and replaced by another, while a later note disputes both identifications.”

The crossed-out, replaced, and disputed identifications directly show labels recording changing scientific judgments.

Question 2Mid

Conservation biologists hypothesize that a waxy coating made by bacterium B7 protects marsh-grass seeds from salt damage. In laboratory trials, seeds carrying B7 survived salt exposure more often than seeds without the bacterium.

Which finding, if true, would most directly weaken the biologists’ hypothesis?

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Answer: B — Removing the genes that produce B7’s waxy coating did not reduce the survival of B7-carrying seeds under salt exposure.

If disabling production of the waxy coating does not reduce salt survival, the coating is unlikely to be the cause of the protection.

Question 3Easier

A university radio station ran two limited series last year: Fault Lines, about predicting structural failure, and Synapse Hour, about how brains parse speech. Taken together, the series illustrate the breadth of scientific fields the station is willing to put on air.

Which finding, if true, would most directly support the underlined claim?

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Answer: A — Fault Lines episodes cited geology, metallurgy, and civil engineering, while Synapse Hour episodes drew on psychology, neurology, and linguistics.

Naming several distinct disciplines across the two series directly supports a claim about scientific breadth; experts from one discipline, shared production details, and concentrating on one research problem within each field do not.

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