Sunken Lesson

1. Sunken Lesson It’s Alive!!! Betty Jo Leonard 7th grade

2. CHARACTERISTICS OF LIVING THINGS • The six characteristics of living things are: • Living things must have cells • Living things must sense and respond to change • Living things must be able to reproduce

3. Living things must have DNA • Living things must use energy • Living things must grow and develop

4. Living things must have cells • Every living organism is composed of cells. • A cell is a membrane-covered structure that contains al of the materials necessary for life • There are two types of cells: • Unicellular • Multicellular

5. Characteristics of Unicelluar organisms Unicellular organism are composed of only one cell Examples: Amoeba Hydra

6. Unicellular organisms reproduce asexually • Unicellular organisms do not perform specialized functions

7. Characteristics of Multicellular organisms • Multicellular organisms are composed of two or more cells and the numbers can be in the trillions. Examples: Monkeys Trees Humans

8. Multicellular organisms reproduce sexually • Multicellular organisms has cells that perform specific functions. Examples: Muscle cells are specialized for movement Nerve cells transport signals

9. Living things must sense and respond to change All organisms have the ability to sense change in their environment and respond to that change. Stimulus (plural stimuli) is any change in an organism’s environment that affects the activity of the organism

10. Response is the reaction to what happens when you reacted to the stimulus

11. Homeostasis is the ability to maintain a stable internal environment regardless of the external environment Example: - The body sweats when it is hot outside in the summer - The body shivers with cold chills when the body is cold

12. Living must be able to reproduce • There are two types of reproduction: • Asexual • Sexual

13. Asexual reproduction is where a single parent produces offspring that is identical to the parent Example: Earthworm Amoeba

14. Sexual reproduction is where two parents from opposites sexes each contributes sex cells to produce offspring that will share characteristics of both parents Examples: Animals Flowers

15. Living things must have DNA • DNA is an acronym for deoxyribonucleic acid Deoxyribonucleic acid is heredity material that controls all the activities of a cell, contains the information to make new cells and provides for making proteins

16. DNA provides instructions for making molecules called proteins • Proteins are responsible for almost all of the activities of an organism’s characteristics

17. During reproduction DNA is copied and passed on its offspring • DNA carries the characteristics of the organism • Heredity is the transmission of characteristics from one generation to the next generation

18. Living things must use Energy • Organisms use energy to carry out the activities of life • Metabolism is the sum total of all the chemical activities that a cell performs

19. Four stages of Metabolism • Ingestion • Digestion • Respiration • Excretion

20. Ingestion is the taking in of food

21. Digestion is the breaking down and absorption of nutrients (food)

22. Respiration is the exchanges of gases in the body

23. Excretion is the removal of bodily waste • There are four ways in which bodily waste are excreted from the body -Urine -Feces (Bowel Movements-BM’s) -Perspiration (sweat) -Carbon Dioxide (Exhaling)

24. Living things must have the ability to Grow and Develop • All organisms regardless whether they are unicellular (single-cell) or multicellular (two or more cells) grow and develop during periods of their lives

25. Developmental Stages • Embryo • Infancy • Toddler • Adolescent • Adulthood