Presentation is loading. Please wait.

Presentation is loading. Please wait.

1.3 Characteristics of Life. 1. Living things are made of cells These units help to organize their materials.

Similar presentations


Presentation on theme: "1.3 Characteristics of Life. 1. Living things are made of cells These units help to organize their materials."— Presentation transcript:

1 1.3 Characteristics of Life

2 1. Living things are made of cells These units help to organize their materials.

3 Examples of Cells Nerve cell Red blood cell Fat cell Egg and sperm Cheek cell

4 2. Living things reproduce Why is this so important? How do plants reproduce? How do animals reproduce? pollen Egg and sperm Euglena separate

5 Types of Reproduction Sexual Reproduction Two parents unite to form a new organism Asexual Reproduction A single parent divides itself two produce offspring

6 3. Living things are based on a universal genetic code (DNA). All living things have the same bases (A, T, C, G) in their DNA-they are just in different order

7 4. Living things grow and develop Each organism has a pattern of growth and development characteristic of its species.

8 5. Living things obtain and use materials and energy Organisms take in energy and transform it to perform all of life’s activities. -metabolism -photosynthesis

9 Metabolism = Combination of chemical reactions through which an organism builds up or breaks down materials.

10 6. Living Things Respond to Their Environment All organisms respond to environmental stimuli. Nikon MicroscopyU Movie Gallery: Paramecium (Protozoan) Video No. 3Nikon MicroscopyU Movie Gallery: Paramecium (Protozoan) Video No. 3 Eye spot (responds to light)

11 Stimulus-Response A stimulus is a signal to which an organism responds.

12 7. Living Things Maintain a Stable Internal Environment The environment outside an organism may change, but regulatory mechanisms maintain an organisms’ internal environments within limits that sustain life. HowStuffWorks "Homeostasis"

13 Homeostasis

14 homeostasis The ability to maintain a relatively constant internal environment. EXAMPLES: body temp. Blood sugar levels Water levels pH

15 Kidney used for water regulation Gets rid of wastes

16 8. Taken as a group, living things change over time. Evolution

17 BIG IDEAS IN BIOLOGY Science as a Way of Knowing: Observe Question Experiment Research CHAPTER 1

18 BIG IDEAS IN BIOLOGY Interdependence in Nature All forms of life are connected in the biosphere with the cycling of energy and matter CHAPTERS 3-6

19 BIG IDEAS IN BIOLOGY Matter and Energy Matter needed for nutrients Energy needed to fuel life’s processes CHAPTER 2

20 BIG IDEAS IN BIOLOGY Cellular Basis of Life Smallest units of life Organisms are made of one cell or many cells CHAPTER 7

21 BIG IDEAS IN BIOLOGY Information and Heredity All life has a genetic code in DNA CHAPTERS 11-14

22 BIG IDEAS IN BIOLOGY Unity and Diversity of Life All life is made of carbon All life uses protein to build its structures All store genetic information CHAPTER 2

23 BIG IDEAS IN BIOLOGY Evolution Living things change through time Relationships of living things through 3.5 billion years CHAPTERS 15-17

24 BIG IDEAS IN BIOLOGY Structure and Function Structure design enabled function CHAPTER 7

25 BIG IDEAS IN BIOLOGY Homeostasis Organisms must expend energy to maintain internal environment in the face of a changing external environment CHAPTER 35 Br-r-r-r-r

26 BIG IDEAS IN SCIENCE Science, Technology, and Society (STS) (‘should we’ questions) Mad Cow Disease Chronic Fatigue Syndrome Genetic Engineering Cloning p. 23, p. 253, p. 456, and more

27 BRANCHES OF BIOLOGY

28 PUT IN ORDER LARGEST TO SMALLEST Biosphere Ecosystem Community Population Organism Organ Systems Organs Tissues Cells Molecules


Download ppt "1.3 Characteristics of Life. 1. Living things are made of cells These units help to organize their materials."

Similar presentations


Ads by Google