?

SAT® Reading and Writing

Free Version

Upgrade subject to access all content

Easy

Vocabulary 18

SATRW-EVFOKH

Fishy Cooperation Frans B. M. de Waal

De Waal, Frans B. M. "Fishy Cooperation." PLOS Biology (2006): n. pag. Journals.plos.org. Web. 19 Mar. 2016.

In the first paragraph (lines 1-3), when the author refers to a "Scala Naturae," he is referring to a scale of

A

the natural kingdom.

B

intelligence.

C

evolution.

D

size and growth.