What makes something a living thing? Canis lupis familiaris. Biology: The study of life

Why is one living and the other is not?

1. Cells/Organization a. Cell-Smallest unit capable of all life functions Unicellular- one cell ex. Bacteria Multicellular- organism made of many cells

2. DNA/Heredity a. Deoxyribonucleic acid - carries the code for all organisms

What has DNA in the photo?

3. Reproduction b. Sexual reproduction – involves two parents- PROVIDES VARIATION Is it essential for an individual to reproduce? a. Asexual reproduction - involves a single parent

Capybara

4. Grow and Develop b. Organisms develop as they mature into adult organisms a. Organisms grow as they produce MORE CELLS

5. Obtain and use Energy Why do organisms need energy? How do organisms obtain energy? a. Metabolism= the total of all chemical reactions in an organism

6. Respond to Stimulus Light Temperature Odor Sound Pressure Gravity Heat Water a. Stimulus- anything that causes an organism to react

7. Evolution/Adaptation a.Evolution- Groups of Organisms (not individuals) will change over time in order to survive with changing environments b.Adaptation- genetic characteristics that improves organisms ability to survive and reproduce

8. Homeostasis a. Homeostasis- the ability of an organism to maintain its internal environment despite conditions in the external environment. If body temperature rises, you sweat. If body temperature lowers, you shiver. F Blood sugar- low, you eat, too high- body releases insulin F Blood pressure regulated F Amount of CO 2 in blood- causes you to breathe in

Giant tortoise life span = 150 years 9. Limited Life Span

"It's older than the great pyramids, older than Stonehenge” 4,770-year-old "Methuselah" bristle-cone pine. "When Christ walked the earth it was already 2,700 years old." California, USA

Mayfly – life span = one day!

A Lesson in the Art of Enjoying Life!

Alive or Not?

Is a virus living?

1. Made up of one or more cells 2. Have DNA 3. Can Reproduce 4. Grow and develop 5. Obtain and use energy 6. Respond to their environment 7. Can change over time(evolve) 8. Maintain Stable Internal Environment (Homeostasis) 9.Limited life span All Living things share these characteristics.

Origin of Life