INTRO…
• IN THIS LESSON WE WILL LEARN
• THAT ALL LIVING THINGS ARE MADE UP OF CELLS AND THAT CELLS COME FROM OTHER CELLS
• THAT ORGANISMS CAN BE ORGANIZED ACCORDING TO WHETHER THEY ARE MADE OF ONE CELL OR MANY CELLS
• THAT THE STRUCTURE AND FUNCTION OF A LIVING THING IS DETERMINED BY ALL OF ITS CELLS WORKING
TOGETHER
• TO CONSIDER HOW INFORMATION IS GAINED FROM OBSERVING LIVING THINGS AT A VERY SMALL SCALE
1. CELLS OF MULTICELLULAR ORGANISMS
• MULTICELLULAR=AN ORGANISM THAT IS MADE UP OF MANY CELLS
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MULTI=MANY
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THEY SHARE NUTRIENTS AND OTHER MATERIALS
THEY COMMUNICATE THROUGH CHEMICAL SIGNALS
THEY SACRIFICE THEMSELVES IF THEY ENDANGER THE SURVIVAL OF OTHER CELLS
THEY DIVIDE AND REPLICATE TO GROW AND FORM NEW PARTS
• ALL ANIMALS , PLANTS AND MOST FUNGI ARE MULTICELLULAR
• THESE CELLS HAVE A SPECIFIC SHAPE TO DO A SPECIFIC JOB
• CELLS OF A MULTICELLULAR ORGANISM NEED OTHER CELLS TO FUNCTION AND SURVIVE
2. CELLS OF UNICELLULAR ORGANISMS
• UNICELLULAR-ORGANISMS THAT ARE MADE UP OF ONLY ONE CELL
• UNI=ONE
• BACTERIA AND ARCHAEA ARE TWO TYPES OF UNICELLULAR ORGANISMS
• ARCHAEA CAN BE FOUND IN EXTREME ENVIRONMENTS THAT OTHER ORGANISMS CANNOT SURVIVE IN
• MOST ARE TOO SMALL TO SEE WITHOUT A MICROSCOPE
• THE SINGLE CELL CAN SURVIVE ON ITS OWN
• ONE CELL WILL PERFORM ALL OF THE FUNCTIONS THE ORGANISM NEEDS TO SURVIVE
3. CELL THEORY
• CELL THEORY=THE SCIENTIFIC THEORY THAT ALL LIVING THINGS ARE MADE OF CELLS, THAT THE CELL IS
THE BASIC UNIT OF LIFE, AND THAT ALL CELLS COME FROM OTHER CELLS
• THE DEVELOPMENT OF THE MICROSCOPE LED TO THE DEVELOPMENT OF THIS THEORY
• TWO SCIENTISTS NAMED MATTHIAS SCHLEIDEN AND THEODOR SCHWANN GATHERED DATA IN THE FIELD
OF CELL RESEARCH AND FORMULATED THIS CONCEPT
• THIS THEORY APPLIES TO BOTH UNICELLULAR AND MULTICELLULAR ORGANISMS
4. VIRUSES
• VIRUS-= A NONLIVING PARTICLE THAT MAKES COPIES OF ITSELF INSIDE LIVING CELLS
• BACTERIA AND VIRUSES ARE OFTEN CONFUSED AND THOUGHT TO BE THE SAME, BUT A BACTERIA IS ALIVE
AND CAN BE TREATED WITH ANTIBIOTICS
• ANTI=AGAINST BIO=LIFE……ANTIBIOTIC=AGAINST LIFE
• VIRUSES WILL ATTACH THEMSELVES TO A LIVING CELL AND INFECT IT
• THEY WILL REPLICATE WITHIN THE HOST CELL UNTIL THE HOST CELL DIES AND BURSTS.
• THIS RELEASES THE REPLICATED VIRUSES INTO THE ORGANISM TO CONTINUE TO INFECT AND REPLICATE