05.1 The Biosphere

Characteristics of Living things

1. They are all made up of

   1. Cells, either only one (unicellular organism) or more (pluricellular)

2. They do the vital functions: (nutrition, intercation and reproduction)

3. They all have a similar composition

• Biolelements: C, H, O, N, P (Phosphorus), S (sulphur)

• Biomolecules:

  • Inorganic biomolecules:water and mineral salts

  • Organic molecules: Carbohydrates, Fats or lipids ,Proteins and Nucleic acids.

VITAL FUNCTIONS

NUTRITION

• Autotrophs (they CAN produce their own organic compounds),

either they get Energy from the SUN: PHOTOSYNTHESIS

or from Chemical _Ractions: CHEMOSYNTHESIS

• Heterotrophs (they cannot produce their own organic compounds)

INTERACTION

Response to a change in the environment.

STIMULUS --RESPONSE

REPRODUCTION

• Sexual: 2 individuals needes (male + female) , 2 sexual cells (GAMETES), diverse offspring generated

• Asexual: only ONE individual implied / genetically identical offspring

The 5 kingdoms

Try this test: http://www.quiz.biz/quizz-606543.html

Taxonomy

Watch this IGCSE animation about variation and classification:

http://www.bbc.co.uk/bitesize/ks3/science/organisms_behaviour_health/variation_classification/activity/

Try this classification GAME: http://www-tc.pbs.org/wgbh/nova/assets/swf/1/classify-life/class.swf

Levels of organization of life

CELLS

More info about Cells in the Cells section.

• Cell parts FLASHCARDS GAME_: https://quizlet.com/153941597/cell-structure-flash-cards/

• Learn about the cell with theseinteractives and view with the virtual microscope: http://www.iknowthat.com/ScienceIllustrations/cell/science_desk.swf

• Play 3 in a row with CELL QUESTIONS : http://schoolmediainteractive.com/view/object/interactive/473F353293B156A0472E0561416301A1/FC628C7AAD3C3DF8C3257F73EBD9CDF4

• Learn about the types of CELLS and their differences with these interactive games. https://www.sheppardsoftware.com/health/anatomy/cell/index.htm

• Some more cells games: http://interactivesites.weebly.com/cells.html

• Explore a cell GAME https://www.centreofthecell.org/learn-play/games/explore-a-cell/

• What is a cell GAME: https://www.centreofthecell.org/learn-play/games/what-is-a-cell/

Try this classfication game. http://sciencenetlinks.com/media/filer/2011/10/04/classification.swf

EVOLUTION

The 5 kingdosm and the tree of life