What is life cell theory
This presentation is the property of its rightful owner.
Sponsored Links
1 / 12

What is Life? Cell Theory PowerPoint PPT Presentation


  • 88 Views
  • Uploaded on
  • Presentation posted in: General

What is Life? Cell Theory. What is Life?. What is Life? Where do living things come from? What characteristics do living things share? ?. Characteristics of living things. Living things are made of cells. Living things obtain and use energy. Living things grow and develop.

Download Presentation

What is Life? Cell Theory

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


What is life cell theory

What is Life?Cell Theory


What is life

What is Life?

  • What is Life?

  • Where do living things come from?

  • What characteristics do living things share?

    ?


Characteristics of living things

Characteristics of living things

  • Living things are made of cells.

  • Living things obtain and use energy.

  • Living things grow and develop.

  • Living things reproduce.

  • Living things respond to their environment.

  • Living things adapt to their environment.


Characteristics of living things1

Characteristics of living things

  • Living things are made of cells.

    • The smallest part of an organism is a cell. Some organisms are unicellular while others are multicellular.


Characteristics of living things2

…Characteristics of living things

  • Living things obtain and use energy.

    • Some organisms like plants, algae, and some microrganisms are autotrophs. Autotrophs use photosynthesis to make their own "food." Some bacteria use chemosynthesis for their energy source.

    • Animals and fungi are heterotrophs and capture their food in a variety of ways. The food must be converted to a usable form of energy, ATP. ATP is a chemical our cells can use through metabolism


Characteristics of living things3

…Characteristics of living things

  • Living things grow and develop.


Characteristics of living things4

…Characteristics of living things

  • Living things reproduce.

    • What would happen if organisms couldn’t reproduce?

    • Organisms either reproduce sexually or asexually.


Characteristics of living things5

…Characteristics of living things

  • Living things respond to their environment.

    • This often results in movement of the individual toward safety. This helps to ensure survival of the organism. For example, as young children we learned to avoid hot stoves and busy streets.

    • Plants also have some limited ability to move. They grow up toward the sun, and some have leaves able to turn to follow the sun, allowing them to photosynthesize better. Their roots grow down to search for water and minerals. If a plant doesn't get enough sunlight, water or minerals it will die.


Characteristics of living things6

…Characteristics of living things

  • Living things adapt to their environment.

    • Modifications enable an organism to survive in its environment. Natural selection allows individuals with better adaptations to survive better and reproduce more. Thus, their characteristics are passed into future generations and that makes the species stronger.


Biogenesis vs abiogenesis

Biogenesis vs. Abiogenesis

  • Abiogenesis: “Life from Non-life”

  • A.K.A. Spontaneous Generation. Living things come from non-living matter.

  • There are many silly beliefs that were once commonplace:

  • maggots came from rotting meat

  • mice could be produced from a pile of old rags and bran

  • fish come from rotting leaves.

  • lice come from sweat

  • eels come from sea mud

  • People believed in Spontaneous Generation as late as the 1600’s.

  • Biogenesis: life from life

  • Biogenesis is the idea that life can only come from life. This is one of the main postulates of the cell theory. It assumes that cells can only come from pre-existing cells.

  • Where did the first cells come from, then?


Clapping bear

Clapping Bear

  • Watch the Talking Dog perform and answer the following;

  • Describe the ways the dog looked ‘alive’.

  • What characteristics of living things are NOT shown by the Talking Dog ?


What is life cell theory

  • Make a chart to illustrate how a car seems alive/not alive.


  • Login