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7 Characteristics of Living Things

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7 Characteristics of Living Things COMPOSED OF CELLS All living things are made up of at least one cell Cell Basic or smallest unit of life ... – PowerPoint PPT presentation

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Title: 7 Characteristics of Living Things


1
7 Characteristics of Living Things
2
COMPOSED OF CELLS
  • All living things are made up of at least one
    cell
  • Cell
  • Basic or smallest unit
  • of life
  • Membrane bound structure in which all life
    processes are carried out

3
CELLS
All organisms are organized at the cellular
level This organization enables
organisms to carry out important life processes.
4
REACT AND RESPOND TO STIMULI
  • Stimulus is anything that may cause an organism
    to react - Loud noises, hunger
  • Response - the reaction to something in the
    environment - Run/cover ears, Eat/hunt for food

5
  • Environment All the surroundings of an
    organism
  • Homeostasis maintaining a stable internal
    environment
  • Adaptation
  • Change in traits over time that help an
    organism survive better in an environment
    inheritable changes

6
REPRODUCE
  •   Asexual single parent produces offspring
    identical to parent
  •   Sexual 2 parents produce unique offspring
    having characteristics or traits of each parent

7
Contain DNA Deoxyribonucleic Acid
  • Genetic material that contains the
    blueprints for each organism
  • Provides directions for the making of proteins

8
OBTAIN USE ENERGY
  • Required to carry out life processes- making and
    breaking down food, movement of materials and
    building of cells
  • Metabolism the sum of all the chemical
    processes in an organism

9
METABOLISMThe Sum of All Biochemical Processes
  • Obtain Nutrition
  • Sun is the source of
  • most energy
  • Producers - Make food
  • Consumers - Eat
  • Decomposers Absorb
  • 2. Digestion Break down of large food particles
    into smaller pieces

10
  • Respiration Mixing food with oxygen (O2) to
    release energy
  • Food O2 H2O Waste
  • Energy
  • Synthesis Process of putting together or
    building up
  • Making more cells Growth
  • Repair of Replace old cells
  • Excretion removal of wastes

11
GROWTH DEVELOPMENT
  • GROWTH the increase in size of an organism
  • Surface to volume ratio limits how large a cell
    can grow

12
Growth in Single-Celled Organisms
  • In single-celled organisms growth occurs by an
    increase in cell size
  • Cell can either stay big or divide

13
Growth in Multi-celled Organisms
  • In multi-celled organisms growth occurs by
    production of new cells
  •    Increases the total number of cells in the
    organism
  •    Increases total surface to volume ratio

14
Surface to Volume
  • Volume

Surface area
Volume
O2 , Food
H2O
Wastes
15
DEVELOPMENT
  • Development All the changes an organism
    undergoes as it grows and matures 
  •   Newborn puppies cant see at birth
  •    Human babies develop the ability to speak and
    walk

16
LIFE SPAN
All organisms, and individual cells, have a
specific life span Includes Birth Death
  • Stages in Human Life Cycle
  • Birth ? Infancy ? Childhood ? Adolescence ?
    Adulthood ?
  • Advanced Adulthood ? Death

17
4 Basic Needs of All Living Things
18
Food
  • Needed to provide Energy to carry out life
    processes
  • Ultimate source of energy is the sun
  • Can get food as a producer, consumer or
    decomposer
  • Provides raw materials for growth and repair

19
Water
  • Cells contain 70 water
  •    Needed to release energy in food and for
    other biochemical reactions
  •    Required for transporting materials
    throughout organism
  •   Helps with dissolving or diluting waste
    products

20
Air or Gases
  •    Carbon Dioxide (CO2) required for
    photosynthesis - converting of energy from sun
    into food (glucose) organisms can use
  •    Oxygen (O2) required for respiration-
    releasing of energy from food (glucose) into
    energy organism can use
  •    Other gases are needed in smaller amounts for
    various life processes not required by all
    organisms

21
Environment
Biotic - living parts other organisms that meet
all 7 characteristics Living things may have to
compete for their living space
  • Abiotic-non-living parts physical features such
    as air, water, temperature (climate)
  • Must contain all the needs for that organism to
    survive

22
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