Characteristics of living things  (see also text book pages 4-10) 

1. All living things are made up of cells. Organisms may be Unicellular (made up of one cell or Multicellular (made up of many cells)

2. All living things must be able to reproduce. Required for the species but not for each individual. Two basic kinds of reproduction are

Sexual reproduction – two cells from different parents unite to form zygote (first cell of new organism)

Asexual reproduction – one parent gives rise to new individual (binary fission or budding for example)

3. A L T are based on a universal genetic code, generally DNA  

4. A L T Grow and develop – to get larger and change, have a life cycle

5. A L T Obtain and use materials and energy Nutrition

Transport - movement of materials into out of or within

Metabolism – Chemical reactions of the life processes

Ingestion - taking in materials

Digestion – breaking down large molecules into simpler usable substances

Respiration – Combining oxygen with the products of digestion to release energy

Excretion – ridding the organism of waste materials  

Egestion - ridding the organism of unusable materials  

Nutrients – substances an organism needs for Energy Growth repair or maintenance

Synthesis – Production of large molecules by combining smaller ones

Photosynthesis – Production of large molecules (which contain stored energy) from smaller molecules using the suns energy

6. ALT respond to their environment – (Irritability) leaves face the sun, birds may fly south

7. ALT Maintain  and regulate (control) an internal balance. Homeostasis – process by which organisms keep their internal conditions relatively the same

8. ALT evolve or can change over generations in response to environmental changes

Individual organisms can’t evolve, a species can over many generations

9. Some like animal cells have Locomotion - ability to move from place to place.