Critical Thinking Activities - Chapter 34

Question 1. The text correctly notes that the earliest land invertebrates, based on fossil evidence, were scorpions. However, modern scorpions feed by attacking other invertebrates. Is there a logical problem here? What is the problem, and what additional bit of research or evidence is necessary to solve this dilemma?

Question 2. Why are giant ants and spiders the size of humans or elephants not possible?

Answers are available to instructors in the Instructor's Manual.
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