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Updated on: 18 Sep 2019, 09:12
Originally posted by vageesh on 12 Jan 2010, 10:17.
Last edited by Sajjad1994 on 18 Sep 2019, 09:12, edited 2 times in total.
Last edited by Sajjad1994 on 18 Sep 2019, 09:12, edited 2 times in total.
Updated - Complete topic (564).
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Question 1
B
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
25%
(medium)
Question Stats:
64% (02:10) correct
36%
(02:09) wrong
based on 487
sessions
History
Date
Time
Result
Not Attempted Yet
Question 2
D
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
65%
(hard)
Question Stats:
44% (01:11) correct 56%
(01:01) wrong
based on 455
sessions
History
Date
Time
Result
Not Attempted Yet
Question 3
B
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
5%
(low)
Question Stats:
81% (00:41) correct 19%
(00:33) wrong
based on 432
sessions
History
Date
Time
Result
Not Attempted Yet
Question 4
D
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
55%
(hard)
Question Stats:
59% (01:39) correct 41%
(01:40) wrong
based on 417
sessions
History
Date
Time
Result
Not Attempted Yet
New Project RC Butler 2019 - Practice 2 RC Passages Everyday
Passage # 338, Date : 18-Sep-2019
This post is a part of New Project RC Butler 2019. Click here for Details
Passage # 338, Date : 18-Sep-2019
This post is a part of New Project RC Butler 2019. Click here for Details
One of the questions of interest in the study of the evolution of spiders is whether the weaving of orb webs evolved only once or several times. About half the 35,000 known kinds of spiders make webs; a third of the web weavers make orb webs. Since most orb weavers belong either to the Araneidae or the Uloboridae families, the origin of the orb web can be determined only by ascertaining whether the families are related.
Recent taxonomic analysis of individuals from both families indicates that the families evolved from different ancestors, thereby contradicting Wiehle’s theory. This theory postulates that the families must be related, based on the assumption that complex behavior, such as web building, could evolve only once. According to Kullman, web structure is the only characteristic that suggests a relationship between families. The families differ in appearance, structure of body hair, and arrangement of eyes. Only Uloborids lack venom glands. Further identification and study of characteristic features will undoubtedly answer the question of the evolution of the orb web.
Recent taxonomic analysis of individuals from both families indicates that the families evolved from different ancestors, thereby contradicting Wiehle’s theory. This theory postulates that the families must be related, based on the assumption that complex behavior, such as web building, could evolve only once. According to Kullman, web structure is the only characteristic that suggests a relationship between families. The families differ in appearance, structure of body hair, and arrangement of eyes. Only Uloborids lack venom glands. Further identification and study of characteristic features will undoubtedly answer the question of the evolution of the orb web.
1. The primary purpose of the passage is to
(A) settle the question of whether orb webs evolved once or more than once
(B) describe scientific speculation concerning an issue related to the evolution of orb webs
(C) analyze the differences between the characteristic features of spiders in the Araneidae and Uloboridae families
(D) question the methods used by earlier investigators of the habits of spiders
(E) demonstrate that Araneidae spiders are not related to Uloboridae spiders
(A) settle the question of whether orb webs evolved once or more than once
(B) describe scientific speculation concerning an issue related to the evolution of orb webs
(C) analyze the differences between the characteristic features of spiders in the Araneidae and Uloboridae families
(D) question the methods used by earlier investigators of the habits of spiders
(E) demonstrate that Araneidae spiders are not related to Uloboridae spiders
2. It can be inferred from the passage that all orb-weaving spiders belong to types of spiders that
(A) lack venom glands
(B) are included either in the Uloboridae or Araneidae families
(C) share few characteristic features with other spider types
(D) comprise less than a third of all known types of spiders
(E) are more recently evolved than other types of spiders
(A) lack venom glands
(B) are included either in the Uloboridae or Araneidae families
(C) share few characteristic features with other spider types
(D) comprise less than a third of all known types of spiders
(E) are more recently evolved than other types of spiders
3. According to the passage, members of the Araneidae family can be distinguished from members of the Uloboridae family by all of the following EXCEPT:
(A) the presence of venom glands
(B) the type of web they spin
(C) the structure of their body hair
(D) the arrangement of their eyes
(E) their appearance
(A) the presence of venom glands
(B) the type of web they spin
(C) the structure of their body hair
(D) the arrangement of their eyes
(E) their appearance
4. Which of the following statements, if true, most weakens Wiehle’s theory that complex behavior could evolve only once?
(A) Horses, introduced to the New World by the Spaniards, thrived under diverse climatic conditions.
(B) Plants of the Palmaceae family, descendants of a common ancestor, evolved unique seed forms even though the plants occupy similar habitats throughout the world.
(C) All mammals are descended from a small, rodentlike animal whose physical characteristics in some form are found in all its descendants.
(D) Plants in the Cactaceae and Euphorbiaceae families, although they often look alike and have developed similar mechanisms to meet the rigors of the desert, evolved independently.
(E) The Cuban anole, which was recently introduced in the Florida wilds, is quickly replacing the native Florida chameleon because the anole has no competitors.
(A) Horses, introduced to the New World by the Spaniards, thrived under diverse climatic conditions.
(B) Plants of the Palmaceae family, descendants of a common ancestor, evolved unique seed forms even though the plants occupy similar habitats throughout the world.
(C) All mammals are descended from a small, rodentlike animal whose physical characteristics in some form are found in all its descendants.
(D) Plants in the Cactaceae and Euphorbiaceae families, although they often look alike and have developed similar mechanisms to meet the rigors of the desert, evolved independently.
(E) The Cuban anole, which was recently introduced in the Florida wilds, is quickly replacing the native Florida chameleon because the anole has no competitors.
12 Jan 2010, 21:51
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vageesh
15 Jan 2010, 00:42
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vannbj
Correct. I overlooked the statement "descendants of a common ancestor," and instead concentrated on the statements "the plants occupy similar habitats throughout the world." Thought if the plants are found throughout the world then they must have evolved independently. However they can be spread across the world due to various factors such as wind, birds etc carrying pollens. Obviously, I was thinking beyond the context of the passage. Classic example that answers are easily inferred by closely studying the passage.
