An arco book arco is a registered trademark of Thomson Learning, Inc., and is used herein under license by Peterson’s. About The Thomson Corporation and Peterson’s

91. The correct answer is (A). The primary root demonstrates the greatest sensitivity to low amounts
of growth regulators.
92. The correct answer is (D). Apical dominance exists when the terminal bud of a stem inhibits lateral
bud growth during stem elongation.
93. The correct answer is (D). Induction is said to occur when the differentiation of cells is the result of
location. In these experiments, the mesoderm induces the overlying ectoderm to produce a certain
type of ectodermal derivative.
94. The correct answer is (C). As outlined in the experiments, the mesoderm determines the type of
growth the ectoderm will produce. Thus, the leg mesoderm would be expected to cause the overlying
ectoderm to produce leg feathers.
95. The correct answer is (D). Choice (D) represents the only reasonable conclusion that can be drawn
from the data supplied. Choices (B), (C), and (E) are not in agreement with the data. Activity level is
not discussed, so choice (A) cannot represent a reasonable conclusion of the data.

---

---

279
ARCO
■  SAT II Subject Tests
www.petersons.com/arco
Lesson
10
CHEMISTRY SUBJECT TEST
The Chemistry Subject Test consists of 85 multiple-choice questions. In terms of its overall level of
difficulty, the test is intended for students who have had a one-year introductory course in chemistry of
the sort that is included in a college preparatory curriculum.
The following table summarizes the topics tested and the approximate number of questions for each:
Topics Tested
Approximate Percentage of Test
Structure of Matter
25
States of Matter
15
Reaction Types
14
Stoichiometry
12
Equilibrium and Reaction Rates
7
Thermodynamics
6
Descriptive Chemistry
13
Laboratory
8
Although 85 questions is a lot to answer in an hour, that is not a large number of questions when
compared with the amount of information that is conveyed in a full-year course in chemistry. For this
reason, not everything you learned in chemistry can be the basis for a test question. Conversely, you may
encounter some questions that test areas not emphasized in your course.The outline of important concepts
(below) is intended to help you refresh your memory in a general way about the concepts you learned in
your chemistry course.