Is this biology
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Is this biology? PowerPoint PPT Presentation


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Is this biology?. Is this biology?. Is this biology?. Is this biology?. Is this biology?. Is this biology?. Is this biology?. Biology. Defined : the study of life Organism : anything that can carry on the processes of life Species : organisms that can reproduce in breed

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Is this biology?

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Is this biology

Is this biology?


Is this biology1

Is this biology?


Is this biology2

Is this biology?


Is this biology3

Is this biology?


Is this biology4

Is this biology?


Is this biology5

Is this biology?


Is this biology6

Is this biology?


Biology

Biology

  • Defined: the study of life

  • Organism: anything that can carry on the processes of life

  • Species: organisms that can reproduce in breed

    • Over 2 million species

    • More diverse along equator

  • Life has been traced to over 3.5 billion years old


Is this biology

Is Fire Alive?

  • Made of cells

    2) Reproduces

    3) Grows and Develops

    4) Has organization

    5) Requires energy

    6) Responds to environment

no

yes

yes

no

yes

yes


Is this biology

Are Cars Alive?

yes

  • Made of cells

    2) Reproduces

    3) Grows and Develops

    4) Has organization

    5) Requires energy

    6) Responds to environment

no

no

yes

yes

yes


Is this biology

Life Characteristics

  • All life (from bacteria to humans) has a few common characteristics

    1) Based from cells

    • Cell = most basic unit of life

    • All cells capable of carrying on life processes

    • Some cells specialized for specific duties

      • Ex: Red blood cells carry O2


Is this biology

Life Characteristics

2) Requires energy

  • Energy = ability to do work or cause change

  • Energy controls metabolism (ability to break down materials)

  • Most life energy obtained from the sun

    • Autotrophs: create energy from the sun (ex: plants & algae)

    • Heterotrophs: consumer others for energy (ex: fungi & animals)


Is this biology

Life Characteristics

3) Responds to environment

  • Stimulus = environmental factors

    • Ex: Sound, light, touch


Is this biology

Life Characteristics

  • 4) Reproduces and develops

    • Genetic material (DNA) passed to next generation

    • Asexual reproduction: offspring produced from a single parent

      • Offspring genetically identical to parent

    • Sexual reproduction: offspring is a genetic mixture of two parents

      • Offspring vary genetically from parents


Quick review

Quick Review

  • Life on Earth is very diverse

  • All life has certain features in common

  • Energy moves from one organism to another


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