(D) "integration of details with perceived ends and purposes" (lines 37-38)
(E) "silk-thin veils of tranquility" (line 64)
21. The author's attitude toward the mammals dis- cussed in the passage is best described as
(A) superior and condescending
(B) lighthearted and jocular
(C) apologetic and conciliatory
(D) wistful and tender
(E) respectful and admiring
22. The author provides information that would answer which of the following questions?
I. Why is an aroused herbivore usually fearful?
II. What are some of the degrees of attention in large mammals?
III. What occurs when the stimulus that causes arousal of a mammal is removed?
(A) I only (B) III only (C) I and II only
(D) II and III only (E) I, II and III
23. According to the passage, improvement in brain function among early large mammals resulted primarily from which of the following?
(A) Interplay of predator and prey
(B) Persistence of free-floating awareness in animals of the grasslands
(C) Gradual dominance of warm-blooded mam- mals over cold-blooded reptiles
(D) Interaction of early large mammals with less intelligent species
(E) Improvement of the capacity for memory among herbivores and carnivores
24. According to the passage, as the process of arousal in an organism continues, all of the following may occur EXCEPT