1. LIVING MATTER

1. Look at the photographs and answer the questions:

  • Which photograph shows living beings?
  • What are living beings made of?
  • What is a cell? Give a brief definition
  • In the first photograph are all the cells the same? What is happening? What instrument was used to take the photograph?
  • Put the following into order according to size:
    • Cell
    • Atom
    • Molecule
    • Tissue

2.  Which of these words are related with the structure of cells? Why?

  • Mitochondrion
  • blood
  • organ
  • virus
  • flagellum
  • ribosome
  • chromosome
  • cytoplasm
  • photosynthesis
  • organelle
  • membrane
  • nucleus

3. Try to define the following concepts:

  • Matter
  • Bioelement
  • Biomolecule
  • Atom
  • Organelle
  • Cell

WHAT TO LEARN IN THIS UNIT?

 Levels of organisation in living beings: overview.
 Bioelements.
 Biomolecules: organic and inorganic; main types; their role in the human being.
 Cells: unicellular and multicellular beings; eukaryotic and prokaryotic cells and organisms; components (and their functions) of prokaryotic, plant and animal cells.
 Overview of the cell activity: nutrition, interaction and reproduction.
 Supracellular levels of organisation: thalluses, tissues, organs, systems of organs, apparatuses.

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