diversity extra practice answers

Chapter 1 Review Questions

(Student textbook pages 45–7)

1. a

2. b

3. c

6. c

7. d

8. e

9. It allows scientists to communicate easily and reduces confusion.

12. same genus

13. a. False, all bacteria are prokaryotes.

b. True

c. False, the phylogenetic species concept classifies organisms based on their evolutionary histories.

14. They belong to the same genus but different species.32. Answers should show that the determination of species may need further study, such as whether or not the offspring are fertile.

34. Binomial nomenclature is universally accepted. Common names are regional and can lead to confusion.


Chapter 1 Self-Assessment Questions

(Student textbook pages 48–9)

1. d

3. e

4. d

5. a

6. b

7. e

11. Protista

20. Eukaryotic cells have internal membranes; prokaryotic cells do not (see Figure 1.14).

22. fungi – multicellular, cell walls, heterotrophic


Chapter 2 Self-Assessment Questions

(Student textbook pages 86–7)

1. d

2. b

4. c

5. d

9. a

10. c

Chapter 3 Review Questions

(Student textbook pages 137–9)

1. d

2. b

3. d

4. d

8. c

9. Plant cell walls are made primarily of cellulose. Fungal cell walls are made primarily of chitin. Animal cells do not have cell walls.

10. The main characteristic that distinguishes these two groups is the presence or absence of a backbone. Animals without backbones are invertebrates, whereas those with backbones are vertebrates. All but one (34/35) animal phyla are made entirely of invertebrates.

Chapter 3 Self-Assessment Questions

(Student textbook pages 140–1)

1. a

3. b

6. d

7. d

8. a

9. d

17. They are composite organisms made of a fungus and a photosynthetic organism.

21. echinodermata- endoskeleton, water vascular system

22. arthropoda- jointed appendages, exoskeleton

23. Mammal: makes milk, has hair

25. The more biodiverse an ecosystem is, the more resilient it is to disturbance.