SAT Subject Biology Practice Question 209: Answer and Explanation

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Question: 209

19. Identify the organism shown using the following dichotomous key.

A. Acari
B. Araneae
C. Opiliones
D. Scorpiones
E. Pseudoscorpiones

Correct Answer: E


The organism shown has distinct body segments (1a) and large pincers, or pedipalps (2a), and lacks a stinger at the end of the abdomen (4a). It is therefore Pseudoscorpiones.

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