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Unformatted text preview: ed only once or several times. About half the 9. According to the passage, members of the Araneidae 35,000 known kinds of spiders make webs; a third of the family can be distinguished from members of the web weavers make orb webs. Since most orb weavers Uloboridae famil y by all of the following belong either to the Araneidae or the Uloboridae families, the origin of the orb web can be determined A the presence of venom glands only by ascertaining whether the families are related. B the structure of their body hair Recent taxonomic analysis of individuals from both C the arrangement of their eyes families indicates that the families evolved from different ancestors, thereby contradicting Wiehle‘s theory. This 10. Which of the following statements, if true, most theory postulates that the families must be related, based weakens Wiehle‘s theory that complex behavior on the assumption that complex behavior, such as web could evolve only once? building, could evolve only once. According to Kullman, (A) Horses, introduced to the New World b y the web structure is the only characteristic that suggests a Spaniards, thrived under diverse climatic relationship between families. The families differ in conditions. appearance, structure of body hair, and arrangement (B) Plants of the Palmaceae family, descendants of of eyes. Only Uloborids lack venom glands. Further a common ancestor, evolved unique seed identification and study of characteristic features will forms even though the plants occupy similar undoubtedly answer the question of the evolution of habitats throughout the world. the orb web. (172 words) (C) All mammals are descended from a small, rodentlike animal whose physical characteristics in some form are found in all its descen- 8. The primary purpose of the passage is to dants. (A) settle the question of whether orb webs evolved (D) Plants in the Cactaceae and Euphorbiaceae once or more than once families, although they often look alike and (B) describe scientific speculation concerning an have developed similar mechanisms to meet issue related to the evolution of orb webs the rigors of the desert, evolved indepen- (C) analyze the differences between the character- dently. istic features of spiders in the Araneidae and (E) The Cuban anole, which was recently intro- Uloboridae families duced in the Florida wilds, is quickly (D) question the methods used by earlier investiga- replacing the native Florida chameleon tors of the habits of spiders because the anole has no competitors. (E) demonstrate that Araneidae spiders are not related to Uloboridae spiders 124 Exercise 22 1. According to Quine‘s conception of empiricism, if a Historically, a cornerstone of classical empiricism has been the notion that every true generalization must be new observation were to contradict some statement confirmable b y specific observations. In classical already within our system of knowledge, which of empiricism, the truth of ―All balls are red,‖ for exam...
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This document was uploaded on 09/16/2013.

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