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Slide 1 of 30 Copyright Pearson Prentice Hall 7-4 The Diversity of Cellular Life.

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Presentation on theme: "Slide 1 of 30 Copyright Pearson Prentice Hall 7-4 The Diversity of Cellular Life."— Presentation transcript:

1 Slide 1 of 30 Copyright Pearson Prentice Hall 7-4 The Diversity of Cellular Life

2 Slide 2 of 30 Copyright Pearson Prentice Hall 7-4 The Diversity of Cellular Life The differences among living things arise from: the ways in which cells are specialized to perform certain tasks the ways in which cells associate with one another to form multicellular organisms.

3 7-4 The Diversity of Cellular Life Slide 3 of 30 Copyright Pearson Prentice Hall Unicellular Organisms Unicellular organisms are made up of only one cell. Unicellular organisms dominate life on Earth.

4 7-4 The Diversity of Cellular Life Slide 4 of 30 Copyright Pearson Prentice Hall Multicellular Organisms Organisms that are made up of many cells are called multicellular. There is a great variety among multicellular organisms.

5 7-4 The Diversity of Cellular Life Slide 5 of 30 Copyright Pearson Prentice Hall Multicellular Organisms What is cell specialization?

6 7-4 The Diversity of Cellular Life Slide 6 of 30 Copyright Pearson Prentice Hall Multicellular Organisms Cells throughout an organism can develop in different ways to perform different tasks. This process is called cell specialization.

7 7-4 The Diversity of Cellular Life Slide 7 of 30 Copyright Pearson Prentice Hall Multicellular Organisms Specialized Animal Cells Animal cells are specialized in many ways.

8 7-4 The Diversity of Cellular Life Slide 8 of 30 Copyright Pearson Prentice Hall Multicellular Organisms Red blood cells transport oxygen.

9 7-4 The Diversity of Cellular Life Slide 9 of 30 Copyright Pearson Prentice Hall Multicellular Organisms Cells in the pancreas produce proteins.

10 7-4 The Diversity of Cellular Life Slide 10 of 30 Copyright Pearson Prentice Hall Multicellular Organisms Muscle cells allow movement.

11 7-4 The Diversity of Cellular Life Slide 11 of 30 Copyright Pearson Prentice Hall Multicellular Organisms Specialized Plant Cells Highly specialized cells, known as guard cells, allow carbon dioxide to enter leaves.

12 7-4 The Diversity of Cellular Life Slide 12 of 30 Copyright Pearson Prentice Hall Multicellular Organisms Stomata enclosed by guard cells.

13 7-4 The Diversity of Cellular Life Slide 13 of 30 Specialized! Copyright Pearson Prentice Hall

14 7-4 The Diversity of Cellular Life Slide 14 of 30 Copyright Pearson Prentice Hall Levels of Organization What are the four levels of organization in multicellular organisms?

15 7-4 The Diversity of Cellular Life Slide 15 of 30 Copyright Pearson Prentice Hall Levels of Organization The levels of organization in a multicellular organism are: individual cells tissues organs organ systems

16 7-4 The Diversity of Cellular Life Slide 16 of 30 Copyright Pearson Prentice Hall Levels of Organization Smooth muscle tissue Muscle cell Stomach Digestive system

17 7-4 The Diversity of Cellular Life Slide 17 of 30 Copyright Pearson Prentice Hall Levels of Organization In multicellular organisms, cells are the first level of organization.

18 7-4 The Diversity of Cellular Life Slide 18 of 30 Copyright Pearson Prentice Hall Levels of Organization Tissues Similar cells are grouped into units called tissues. A tissue is a group of similar cells that perform a particular function.

19 7-4 The Diversity of Cellular Life Slide 19 of 30 Copyright Pearson Prentice Hall Levels of Organization

20 7-4 The Diversity of Cellular Life Slide 20 of 30 Copyright Pearson Prentice Hall Levels of Organization Most animals have four main types of tissue: muscle epithelial nervous connective

21 7-4 The Diversity of Cellular Life Slide 21 of 30 Copyright Pearson Prentice Hall Levels of Organization Organs Organs are groups of tissues that work together to perform a specific function.

22 7-4 The Diversity of Cellular Life Slide 22 of 30 Copyright Pearson Prentice Hall Levels of Organization

23 7-4 The Diversity of Cellular Life Slide 23 of 30 Copyright Pearson Prentice Hall Levels of Organization Organ Systems In most cases, an organ completes a series of specialized tasks. A group of organs that work together to perform a specific function is called an organ system.

24 7-4 The Diversity of Cellular Life Slide 24 of 30 Copyright Pearson Prentice Hall Levels of Organization

25 - or - Continue to: Click to Launch: Slide 25 of 30 Copyright Pearson Prentice Hall 7-4

26 Slide 26 of 30 Copyright Pearson Prentice Hall 7-4 Cell specialization is characteristic of a.bacteria. b.all unicellular organisms. c.yeasts. d.multicellular organisms.

27 Slide 27 of 30 Copyright Pearson Prentice Hall 7-4 Which of the following cells is specialized for contraction? a.muscle cell b.red blood cell c.pancreatic cell d.nerve cell

28 Slide 28 of 30 Copyright Pearson Prentice Hall 7-4 The stomach is an example of a(an) a.tissue. b.organ. c.organ system. d.organism.

29 Slide 29 of 30 Copyright Pearson Prentice Hall 7-4 Which of the following shows the levels of organization in an organism from the simplest to the most complex? a.organ system, organ, cell, tissue b.tissue, cell, organ, organ system c.cell, tissue, organ, organ system d.cell, organ, tissue, organ system

30 Slide 30 of 30 Copyright Pearson Prentice Hall 7-4 Which of the following would probably contain the greatest variety of specialized cells? a.an organ system b.a tissue c.an organ d.a multicellular organism

31 END OF SECTION


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