Modern Biology 2006 edition

Textbook Cover

John Postlethwait and Janet Hopson
Publisher: Holt McDougal


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  • Chapter 1: The Science of Life
    • Chapter Review (5)
    • Standardized Test Prep (7)

  • Chapter 2: Chemistry of Life
    • Chapter Review (6)
    • Standardized Test Prep (7)

  • Chapter 3: Biochemistry
    • Chapter Review (5)
    • Standardized Test Prep (8)

  • Chapter 4: Cell Structure and Function
    • Chapter Review (4)
    • Standardized Test Prep (7)

  • Chapter 5: Homeostasis and Cell Transport
    • Chapter Review (5)
    • Standardized Test Prep (7)

  • Chapter 6: Photosynthesis
    • Chapter Review (6)
    • Standardized Test Prep (6)

  • Chapter 7: Cellular Respiration
    • Chapter Review (6)
    • Standardized Test Prep (8)

  • Chapter 8: Cell Reproduction
    • Chapter Review (6)
    • Standardized Test Prep (6)

  • Chapter 9: Fundamentals of Genetics
    • Chapter Review (5)
    • Standardized Test Prep (5)

  • Chapter 10: DNA, RNA, and Protein Synthesis
    • Chapter Review (5)
    • Standardized Test Prep (8)

  • Chapter 11: Gene Expression
    • Chapter Review (5)
    • Standardized Test Prep (7)

  • Chapter 12: Inheritance patterns and Human Genetics
    • Chapter Review (5)
    • Standardized Test Prep (7)

  • Chapter 13: Gene Technology
    • Chapter Review (5)
    • Standardized Test Prep (8)

  • Chapter 14: History of Life
    • Chapter Review (5)
    • Standardized Test Prep (7)

  • Chapter 15: Theory of Evolution
    • Chapter Review (5)
    • Standardized Test Prep (6)

  • Chapter 16: Population Genetics and Speciation
    • Chapter Review (5)
    • Standardized Test Prep (7)

  • Chapter 17: Classification of Organisms
    • Chapter Review (5)
    • Standardized Test Prep (6)

  • Chapter 18: Introduction to Ecology
    • Chapter Review (5)
    • Standardized Test Prep (8)

  • Chapter 19: Populations
    • Chapter Review (5)
    • Standardized Test Prep (7)

  • Chapter 20: Community Ecology
    • Chapter Review (5)
    • Standardized Test Prep (6)

  • Chapter 21: Ecosystems
    • Chapter Review (5)
    • Standardized Test Prep (7)

  • Chapter 22: Humans and the Environment
    • Chapter Review (3)
    • Standardized Test Prep (8)

  • Chapter 23: Bacteria
    • Chapter Review (5)
    • Standardized Test Prep (9)

  • Chapter 24: Viruses
    • Chapter Review (5)
    • Standardized Test Prep (8)

  • Chapter 25: Protists
    • Chapter Review (5)
    • Standardized Test Prep (7)

  • Chapter 26: Fungi
    • Chapter Review (3)
    • Standardized Test Prep (7)

  • Chapter 27: The Importance of Plants
    • Chapter Review (5)
    • Standardized Test Prep (6)

  • Chapter 28: Plant Evolution and Classification
    • Chapter Review (5)
    • Standardized Test Prep (8)

  • Chapter 29: Plant Structure and Function
    • Chapter Review (4)
    • Standardized Test Prep (7)

  • Chapter 30: Plant Reproduction
    • Chapter Review (4)
    • Standardized Test Prep (6)

  • Chapter 31: Plant Responses
    • Chapter Review (5)
    • Standardized Test Prep (7)

  • Chapter 32: Introduction to Animals
    • Chapter Review (3)
    • Standardized Test Prep (8)

  • Chapter 33: Sponges, Cnidarians, and Ctenophores
    • Chapter Review (5)
    • Standardized Test Prep (8)

  • Chapter 34: Flatworms, Roundworms, and Rotifers
    • Chapter Review (3)
    • Standardized Test Prep (9)

  • Chapter 35: Mollusks and Annelids
    • Chapter Review (3)
    • Standardized Test Prep (8)

  • Chapter 36: Arthropods
    • Chapter Review (3)
    • Standardized Test Prep (9)

  • Chapter 37: Insects
    • Chapter Review (4)
    • Standardized Test Prep (8)

  • Chapter 38: Echinoderms and Invertebrate Chordates
    • Chapter Review (3)
    • Standardized Test Prep (7)

  • Chapter 39: Fishes
    • Chapter Review (5)
    • Standardized Test Prep (8)

  • Chapter 40: Amphibians
    • Chapter Review (3)
    • Standardized Test Prep (6)

  • Chapter 41: Reptiles
    • Chapter Review (5)
    • Standardized Test Prep (7)

  • Chapter 42: Birds
    • Chapter Review (5)
    • Standardized Test Prep (7)

  • Chapter 43: Mammals
    • Chapter Review (3)
    • Standardized Test Prep (8)

  • Chapter 44: Animal Behavior
    • Chapter Review (5)
    • Standardized Test Prep (8)

  • Chapter 45: Skeletal, Muscular, and Integumentary Systems
    • Chapter Review (3)
    • Standardized Test Prep (7)

  • Chapter 46: Circulatory and Respiratory Systems
    • Chapter Review (4)
    • Standardized Test Prep (6)

  • Chapter 47: The Body's Defense Systems
    • Chapter Review (4)
    • Standardized Test Prep (8)

  • Chapter 48: Digestive and Excretory Systems
    • Chapter Review (4)
    • Standardized Test Prep (6)

  • Chapter 49: Nervous System and Sense Organs
    • Chapter Review (4)
    • Standardized Test Prep (8)

  • Chapter 50: Endocrine System
    • Chapter Review (3)
    • Standardized Test Prep (7)

  • Chapter 51: Reproductive System
    • Chapter Review (3)
    • Standardized Test Prep (8)

Questions Available within WebAssign

Most questions from this textbook are available in WebAssign. The online questions are identical to the textbook questions except for minor wording changes necessary for Web use. Whenever possible, variables, numbers, or words have been randomized so that each student receives a unique version of the question. This list is updated nightly.

Question Group Key
CR - Chapter Review
STP - Standardized Test Prep


Question Availability Color Key
BLACK questions are available now
GRAY questions are under development


Group Quantity Questions
Chapter 1: The Science of Life
1.CR 5 05 06 08 09 10
1.STP 7 01 02 03 04 05 06 07
Chapter 2: Chemistry of Life
2.CR 6 01 02 03 05 06 07
2.STP 7 01 02 03 04 05 06 07
Chapter 3: Biochemistry
3.CR 5 03 04 05 06 07
3.STP 8 01 02 03 04 05 06 07 08
Chapter 4: Cell Structure and Function
4.CR 4 04 05 06 07
4.STP 7 01 02 03 04 05 06 07
Chapter 5: Homeostasis and Cell Transport
5.CR 5 02 04 05 06 08
5.STP 7 01 02 03 04 05 06 07
Chapter 6: Photosynthesis
6.CR 6 02 03 04 06 07 08
6.STP 6 01 02 03 04 05 06
Chapter 7: Cellular Respiration
7.CR 6 05 06 07 08 09 10
7.STP 8 01 02 03 04 05 06 07 08
Chapter 8: Cell Reproduction
8.CR 6 05 06 07 08 09 10
8.STP 6 01 02 03 04 05 06
Chapter 9: Fundamentals of Genetics
9.CR 5 05 06 07 08 09
9.STP 5 01 02 03 04 06
Chapter 10: DNA, RNA, and Protein Synthesis
10.CR 5 05 06 07 08 09
10.STP 8 01 02 03 04 05 06 07 08
Chapter 11: Gene Expression
11.CR 5 05 06 07 08 09
11.STP 7 01 02 03 04 05 06 07
Chapter 12: Inheritance patterns and Human Genetics
12.CR 5 05 06 07 08 09
12.STP 7 01 02 03 04 05 06 07
Chapter 13: Gene Technology
13.CR 5 05 06 07 08 10
13.STP 8 01 02 03 04 05 06 07 08
Chapter 14: History of Life
14.CR 5 05 06 07 08 09
14.STP 7 01 02 03 04 05 06 07
Chapter 15: Theory of Evolution
15.CR 5 04 05 06 07 08
15.STP 6 01 02 03 04 05 06
Chapter 16: Population Genetics and Speciation
16.CR 5 06 07 08 09 10
16.STP 7 01 02 03 04 05 06 07
Chapter 17: Classification of Organisms
17.CR 5 05 06 07 08 09
17.STP 6 01 02 03 04 05 06
Chapter 18: Introduction to Ecology
18.CR 5 04 05 06 07 08
18.STP 8 01 02 03 04 05 06 07 08
Chapter 19: Populations
19.CR 5 02 03 05 06 07
19.STP 7 01 02 03 04 05 06 07
Chapter 20: Community Ecology
20.CR 5 03 04 05 06 07
20.STP 6 01 02 03 04 05 06
Chapter 21: Ecosystems
21.CR 5 04 05 06 07 08
21.STP 7 01 02 03 04 05 06 07
Chapter 22: Humans and the Environment
22.CR 3 06 07 08
22.STP 8 01 02 03 04 05 06 07 08
Chapter 23: Bacteria
23.CR 5 04 05 06 07 08
23.STP 9 01 02 03 04 05 06 07 08 09
Chapter 24: Viruses
24.CR 5 05 06 07 10 12
24.STP 8 01 02 03 04 05 06 07 08
Chapter 25: Protists
25.CR 5 05 06 07 09 11
25.STP 7 01 02 03 04 05 06 07
Chapter 26: Fungi
26.CR 3 05 07 09
26.STP 7 01 02 03 04 05 06 07
Chapter 27: The Importance of Plants
27.CR 5 05 06 07 09 10
27.STP 6 01 02 03 04 05 06
Chapter 28: Plant Evolution and Classification
28.CR 5 06 07 08 09 10
28.STP 8 01 02 03 04 05 06 07 08
Chapter 29: Plant Structure and Function
29.CR 4 08 10 12 13
29.STP 7 01 02 03 04 05 06 07
Chapter 30: Plant Reproduction
30.CR 4 05 06 08 09
30.STP 6 01 02 03 04 05 06
Chapter 31: Plant Responses
31.CR 5 08 09 10 11 12
31.STP 7 01 02 03 04 05 06 07
Chapter 32: Introduction to Animals
32.CR 3 05 06 07
32.STP 8 01 02 03 04 05 06 07 08
Chapter 33: Sponges, Cnidarians, and Ctenophores
33.CR 5 05 06 08 09 15
33.STP 8 01 02 03 04 05 06 07 08
Chapter 34: Flatworms, Roundworms, and Rotifers
34.CR 3 05 06 07
34.STP 9 01 02 03 04 05 06 07 08 09
Chapter 35: Mollusks and Annelids
35.CR 3 05 06 07
35.STP 8 01 02 03 04 05 06 07 08
Chapter 36: Arthropods
36.CR 3 05 07 12
36.STP 9 01 02 03 04 05 06 07 08 09
Chapter 37: Insects
37.CR 4 06 07 08 12
37.STP 8 01 02 03 04 05 06 07 08
Chapter 38: Echinoderms and Invertebrate Chordates
38.CR 3 05 06 08
38.STP 7 01 02 03 04 05 06 07
Chapter 39: Fishes
39.CR 5 05 06 07 11 13
39.STP 8 01 02 03 04 05 06 07 08
Chapter 40: Amphibians
40.CR 3 05 06 07
40.STP 6 01 02 03 04 05 06
Chapter 41: Reptiles
41.CR 5 05 06 07 08 09
41.STP 7 01 02 03 04 05 06 07
Chapter 42: Birds
42.CR 5 05 06 07 09 13
42.STP 7 01 02 03 04 05 06 07
Chapter 43: Mammals
43.CR 3 04 05 06
43.STP 8 01 02 03 04 05 06 07 08
Chapter 44: Animal Behavior
44.CR 5 06 07 09 10 11
44.STP 8 01 02 03 04 05 06 07 08
Chapter 45: Skeletal, Muscular, and Integumentary Systems
45.CR 3 05 06 08
45.STP 7 01 02 03 04 05 06 07
Chapter 46: Circulatory and Respiratory Systems
46.CR 4 05 06 07 08
46.STP 6 01 02 03 04 05 06
Chapter 47: The Body's Defense Systems
47.CR 4 08 09 10 11
47.STP 8 01 02 03 04 05 06 07 08
Chapter 48: Digestive and Excretory Systems
48.CR 4 04 05 06 07
48.STP 6 01 02 03 04 05 06
Chapter 49: Nervous System and Sense Organs
49.CR 4 05 07 08 09
49.STP 8 01 02 03 04 05 06 07 08
Chapter 50: Endocrine System
50.CR 3 05 06 07
50.STP 7 01 02 03 04 05 06 07
Chapter 51: Reproductive System
51.CR 3 01 18 19
51.STP 8 01 02 03 04 05 06 07 08
Total 596