Characteristics of living things

• What is biology?

  The study of living things
• There are 7 processes that must take place in order for something to be alive.
• List in order using the acronym "MR GRENI" the life processes?

  Movement

  Respiration

  Growth

  Reproduction

  Excretion

  Nutrition

  Irritability
• What is movement?

  the change in position of a living organism by its own power
• What is Respiration?

  The process by which energy is released from food and made available to the organism
• What is the equation for respiration in word form?

  oxygen + glucose ----> carbon dioxide + water + energy
• What is the equation for respiration in chemical form?

  6 O2 + C6H12O6 -----> 6 CO2 + 6 H2O + 2880 kJ
• What is growth?

  a permanent increase in size of an organism
• What is reproduction?

  organisms make copies of themselves to ensure the continuation of life on earth
• What is excretion?

  organisms get rid of waste materials
• What is nutrition?

  organisms obtain and make use of food
• What is Irritability?

  The way organisms respond to stimulus
• Levels of organization of an organism?

  Cells ---> Tissues ---> Organs ---> Organ systems ---> organisms