1. Albia Dugger Miami Dade College Cecie Starr Christine Evers Lisa Starr www.cengage.com/biology/starr Chapter 1 Invitation to Biology (Sections 1.1 - 1.4)

2. 1.1 The Secret Life of Earth Biology is the systematic study of life We have encountered only a fraction of the organisms that live on Earth, in part because we have explored only a fraction of its inhabited regions

3. New Species Hundreds of new species are discovered each year – but thousands become extinct due to activities of man

4. 1.2 The Science of Nature Biologists think about life at different levels of organization Emergent properties appear at successively higher levels Life emerges at the cellular level

5. Key Terms biology The scientific study of life emergent property A characteristic of a system that does not appear in any of the system’s component parts

6. A Pattern in Life’s Organization All matter consists of atoms, which combine as molecules Organisms are individuals that consist of one or more cells Cells of larger multicelled organisms are organized as tissues, organs, and organ systems

7. Key Terms atom Fundamental building block of all matter molecule An association of two or more atoms cell Smallest unit of life organism Individual that consists of one or more cells

8. Key Terms tissue In multicelled organisms, specialized cells organized in a pattern that allows them to perform a collective function organ In multicelled organisms, a grouping of tissues that perform a collective function organ system In multicelled organisms, set of tissues and cells engaged in a collective function that keeps the body functioning properly

9. Organization Among Organisms A population is a group of individuals of a species in a given area A community is all populations of all species in a given area An ecosystem is a community interacting with its environment The biosphere includes all regions of Earth that hold life

10. Levels of Life’s Organization

11. Fig. 1.3, p. 4 molecule Atoms joined in chemical bonds. This is a model of a water molecule. The molecules of life are much larger and more complex than water. organ Structural unit of interacting tissues. Flowers are the reproductive organs of many plants. atom Atoms are fundamental units of all substances, living or not. This image shows a model of a single atom. organ system A set of interacting organs. The shoot system of this poppy plant includes its aboveground parts: leaves, flowers, and stems. cell The cell is the smallest unit of life. Some, like this plant cell, live and reproduce as part of a multicelled organism; others do so on their own. tissue Organized array of cells and substances that interact in a collective task. This is epidermal tissue on the outer surface of a flower petal. 1 2 3 4 5 6

12. Fig. 1.3.1, p. 4 atom Atoms are fundamental units of all substances, living or not. This image shows a model of a single atom. 1

13. Fig. 1.3.2, p. 4 molecule Atoms joined in chemical bonds. This is a model of a water molecule. The molecules of life are much larger and more complex than water. 2

14. Fig. 1.3.3, p. 4 cell The cell is the smallest unit of life. Some, like this plant cell, live and reproduce as part of a multicelled organism; others do so on their own. 3

15. Fig. 1.3.4, p. 4 tissue Organized array of cells and substances that interact in a collective task. This is epidermal tissue on the outer surface of a flower petal. 4

16. Fig. 1.3.5, p. 4 organ Structural unit of interacting tissues. Flowers are the reproductive organs of many plants. 5

17. Fig. 1.3.6, p. 4 organ system A set of interacting organs. The shoot system of this poppy plant includes its aboveground parts: leaves, flowers, and stems. 6

18. ANIMATION: Life's levels of organization To play movie you must be in Slide Show Mode PC Users: Please wait for content to load, then click to play Mac Users: CLICK HERECLICK HERE

19. Different Objects Assembled From the Same Parts

20. Fig. 1.2, p. 4 Stepped Art Different Objects Assembled From the Same Parts

21. ANIMATION: Building blocks of life To play movie you must be in Slide Show Mode PC Users: Please wait for content to load, then click to play Mac Users: CLICK HERECLICK HERE

22. Key Concepts The Science of Nature We understand life by studying it at different levels of organization, which extend from atoms and molecules to the biosphere The quality we call “life” emerges at the level of cells

23. 1.3 How Living Things Are Alike Life has underlying unity: All living things have similar characteristics 1.Continual inputs of energy and cycling of materials maintain life’s complex organization 2.Organisms sense and respond to change 3.All organisms use information in DNA inherited from parents to function and reproduce

24. (1) Organisms Require Energy and Nutrients All organisms require energy and nutrients to sustain themselves energy The capacity to do work nutrient Substance that an organism needs for growth and survival, but cannot make for itself

25. Producers and Consumers Producers harvest energy from the environment to make their own food by processes such as photosynthesis Consumers eat other organisms, or their wastes and remains

26. Key Terms producer Organism that makes its own food using energy and simple raw materials from the environment photosynthesis Process by which producers use light energy to make sugars from carbon dioxide and water consumer Organism that gets energy and nutrients by feeding on tissues, wastes, or remains of other organisms

27. Energy, Producers, and Consumers Energy flows one way Materials recycle

28. sunlight energy A Producers harvest energy from the environment. Some of that energy flows from producers to consumers. Producers plants and other self-feeding organisms Consumers animals, most fungi, many protists, bacteria Fig. 1.4b, p. 6 C All of the energy that enters the world of life eventually flows out of it, mainly as heat released back to the environment. Stepped Art B Nutrients that become incorporated into the cells of producers and consumers are eventually released by decomposition. Some cycle back to producers. Energy, Producers, and Consumers

29. ANIMATION: One-way energy flow and materials cycling To play movie you must be in Slide Show Mode PC Users: Please wait for content to load, then click to play Mac Users: CLICK HERECLICK HERE

30. (2) Organisms Sense and Respond to Change Organisms keep conditions in their internal environment within ranges cells tolerate—a process called homeostasis homeostasis Set of processes by which an organism keeps its internal conditions within tolerable ranges Includes body fluid composition and temperature

31. Stimulation and Response Every organism senses and responds to conditions inside and outside itself

32. (3) Organisms Use DNA DNA contains information that guides all of an organism’s metabolic activities, including growth, development, and reproduction Small variations in DNA structure give rise to differences between species and individuals The passage of DNA from parents to offspring is inheritance

33. Key Terms DNA Deoxyribonucleic acid; carries hereditary information that guides growth and development growth In multicelled species, an increase in the number, size, and volume of cells development Multistep process by which the first cell of a new individual becomes a multicelled adult

34. Key Terms reproduction Processes by which parents produce offspring inheritance Transmission of DNA from parents to offspring

35. Key Concepts Life’s Unity All organisms consist of one or more cells that take in energy and raw materials to stay alive All sense and respond to stimuli All function and reproduce with the help of DNA

36. 1.4 How Living Things Differ Different types of organisms differ greatly in details of body form and function Biodiversity is the sum of differences among living things biodiversity Variation among living organisms

37. Diversity of Life Bacteria and archaeans are single-celled, and their DNA is not contained within a nucleus Eukaryotes (protists, plants, fungi, and animals) can be single-celled or multicelled, and their DNA is contained within a nucleus

38. Key Terms bacterium Member of a large group of single-celled organisms archaean Member of a group of single-celled organisms that differ from bacteria nucleus Double-membraned sac that encloses a cell’s DNA eukaryote Organism whose cells characteristically have a nucleus

39. Eukaryotes Protists are the simplest eukaryotes, ranging from amoebas to giant kelps Many fungi are decomposers, including mushrooms Most plants are photosynthetic producers that provide food for most other organisms Animals eat other organisms; they include herbivores, carnivores, scavengers, and parasites

40. Key Terms protist Diverse group of simple eukaryotes fungus Type of eukaryotic consumer that obtains nutrients by digestion and absorption outside the body plant A multicelled, typically photosynthetic producer animal Multicelled consumer that develops through a series of stages and moves about during part or all of its life cycle

41. Bacteria

42. Fig. 1.6a1, p. 8

43. Fig. 1.6a2, p. 8

44. Fig. 1.6a3, p. 8

45. Fig. 1.6a4, p. 8

46. Fig. 1.6a5, p. 8

47. Fig. 1.6a6, p. 8

48. Archaeans

49. Fig. 1.6b1, p. 8

50. Fig. 1.6b2, p. 8

51. Protists

52. Fig. 1.6c1, p. 9

53. Fig. 1.6c2, p. 9

54. Fig. 1.6c3, p. 9

55. Fig. 1.6c4, p. 9

56. Fig. 1.6c5, p. 9

57. Fig. 1.6c6, p. 9

58. Fungi

59. Fig. 1.6c9, p. 9

60. Fig. 1.6c10, p. 9

61. Plants

62. Fig. 1.6c7, p. 9

63. Fig. 1.6c8, p. 9

64. Animals

65. Fig. 1.6c11, p. 9

66. Fig. 1.6c12, p. 9

67. Fig. 1.6c13, p. 9

68. Fig. 1.6c14, p. 9

69. ANIMATION: Life's diversity To play movie you must be in Slide Show Mode PC Users: Please wait for content to load, then click to play Mac Users: CLICK HERECLICK HERE

70. Key Concepts Life’s Diversity Observable characteristics vary tremendously among organisms Various classification systems help us keep track of the differences

71. ANIMATION: Three Domains To play movie you must be in Slide Show Mode PC Users: Please wait for content to load, then click to play Mac Users: CLICK HERECLICK HERE