1. CHARACTERISTICS OF LIFE
WHAT IS LIFE?
CHARACTERISTICS OF LIFE

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What is Life 10.5m

3. CHARACTERISTICS OF LIFE
Biologists have formulated a list of characteristics by which we recognize living things.
Sometimes, nonliving things have one or more of life’s characteristics.
But only when something has all of them can it be considered alive.
Anything that possesses all of the characteristics of life is known as an organism.

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1st - made up of the same basic ingredients 1m

5. LIVING THINGS ARE ORGANIZED
All living things show an orderly structure, or organization.
Whether an organism is unicellular or multicellular, all structures and functions of the organism together form an orderly living system.

6. atom
Is the basic unit of all matter.

7. molecule
A combination of 2 or more atoms.

8. organelles
Little organs that make up the cell.

9. Basic unit of life.
cell
Only true attribute of life.

10. tissue
A group of cells working together to do 1 job

11. organ
A group of tissues working together to do 1 job.

12. Organ system
A group of organs working together to do 1 job

13. circulatory

14. digestive

15. reproductive
endocrine

16. lymphatic

17. muscular

18. nervous

19. respiratory

20. skeletal

21. Excretory (urinary)

22. integumentary

23. organism
Complete living thing.

24. Unicellular – made up of one cell
ORGANISM
Unicellular – made up of one cell
amoeba
paramecium

25. Multicellular – made up of many cells ORGANISM Black widow
Brown recluse

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2nd - are composed of cells 0.5m

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3rd - require water and a source of energy 1m MSDS 17.5m

29. LIVING THINGS REPRODUCE

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4th - can reproduce and grow 0.5m

31. LIVING THINGS REPRODUCE
Reproduction- the process of producing more living things (offspring).
Reproduction is not essential for the survival of an individual
Reproduction is essential to the survival or continuation of an organism’s species.
A species is a group of similar-looking organisms that can interbreed and produce fertile offspring.

32. TYPES OF REPRODUCTION Asexual –
does not involve the fusion of cells (gametes)
Examples: fission and budding
Sexual –
Involves the fusion of 2 haploid cells (sex cells)

33. LIVING THINGS GROW The lives of all organisms begin as a single cell.
Over time it grows and takes on the characteristics of its species.
Growth – results in an increase in the amount of living material and the formation of new structures

34. LIVING THINGS DEVELOP
development - All of the changes that take place during the life of an organism

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5th - have limited life span 0.5m

36. LIFE SPAN
Stages that multicellular organisms go through

37. FIRST STAGE OF THE LIFE SPAN
BEGINNING

38. SECOND STAGE OF THE LIFE SPAN
GROWTH

39. THIRD STAGE OF THE LIFE SPAN
MATURITY

40. FOURTH STAGE OF THE LIFE SPAN
DECLINE

41. FIFTH STAGE OF THE LIFE SPAN
DEATH

44. LIVING THINGS RESPOND
Living things live in constant interface with their surroundings, or environment, which include the air, water, weather, temperature, any organism in the area, and many other factors.
Stimulus - Any condition in the environment that requires an organism to adjust
Response - A reaction to a stimulus

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6th - respond to the surroundings 1m

46. LIVING THINGS MOVE

47. MUST OBTAIN AND USE ENERGY
Energy is the ability to do work or the ability to make things move
It powers life processes
Homeostasis
Growth and reproduction
Movement
It is obtained in the food they eat or produce

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7th - Living things can move 1m

49. LIVING THINGS REPAIR INJURIES

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8th - able to repair injuries 0.5m

51. LIVING THINGS ADAPT
Adaptation - Any structure, behavior, or internal process that enables an organism to respond to stimuli and better survive in an environment. (e.g. – polar bear’s white fur; frog’s webbed feet)

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9th - can undergo change over time 1m

53. LIVING THINGS ADAPT
Sweating – helps maintain a steady internal environment
Homeostasis – regulation of an organism’s internal environment to maintain conditions suitable for life

54. LIFE CYCLES

55. Show video clip:
Life Cycle of Butterflies 20.5m