CHARACTERISTICS OF LIVING THINGS BELL RINGER 6 81516

CHARACTERISTICS OF LIVING THINGS

BELL RINGER #6 8/15/16 ARE YOU ALIVE? HOW DO YOU KNOW?

IS IT ALIVE? • HTTP: //WWW. PBSLEARNINGMEDIA. ORG/ASSET/TDC 02_VID_ALIVE/

1. LIVING THINGS HAVE CELLS • ALL LIVING THINGS HAVE 1 OR MORE CELLS • CELL: MEMBRANE-COVERED STRUCTURE THAT CONTAINS ALL OF THE MATERIALS NECESSARY FOR LIFE

2. LIVING THINGS SENSE & RESPOND TO CHANGE STIMULUS: A CHANGE THAT AFFECTS THE ACTIVITY OF THE ORGANISM • CAN BE CHEMICALS, GRAVITY, LIGHT, SOUNDS, HUNGER, ETC. HOMEOSTASIS: KEEPING A STABLE INTERNAL ENVIRONMENT • EVEN THOUGH EXTERNAL CHANGES IN THE ENVIRONMENT TAKE PLACE, CONDITIONS INSIDE THE ORGANISM MUST STAY THE SAME

3. LIVING THINGS REPRODUCE Asexual Reproductio n Single parent produces offspring identical to the parent Sexual Reproductio n Parents produce offspring with characteristic s of both parents

4. LIVING THINGS HAVE DNA • DNA CONTROLS THE STRUCTURE AND FUNCTION OF CELLS • WHEN ORGANISMS REPRODUCE, THEY PASS COPIES OF THEIR DNA TO THEIR OFFSPRING • HEREDITY: PASSING TRAITS FROM ONE GENERATION TO THE NEXT

5. LIVING THINGS USE ENERGY • ORGANISMS NEED ENERGY TO MAKE & BREAK DOWN FOOD, MOVE MATERIALS IN & OUT OF CELLS, AND TO MAKE MORE CELLS • METABOLISM: THE SUM OF ALL CHEMICAL PROCESSES THAT OCCUR IN AN ORGANISM

6. LIVING THINGS GROW & DEVELOP