Name: ____________________________________________________ Group:__________ Date:__________________
Activity 1. The Science of Biology
1. What is science?
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2. What are the goals of science?
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How Penicillin Was Discovered
In 1928, Sir Alexander Fleming was studying Staphylococcus bacteria growing in culture dishes. He noticed that
a mold called Penicillium was also growing in some of the dishes. A clear area existed around the mold because
all the bacteria that had grown in this area had died. In the culture dishes without the mold, no clear areas were
present.
Fleming hypothesized that the mold must be producing a chemical that killed the bacteria. He decided to isolate
this substance and test it to see if it would kill bacteria. Fleming transferred the mold to a nutrient broth solution.
This solution contained all the materials the mold needed to grow. After the mold grew, he removed it from the
nutrient broth. Fleming then added the nutrient broth in which the mold had grown to a culture of bacteria. He
observed that the bacteria died.
3. Identify the problem.
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4. What was Fleming's hypothesis?
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5. How was the hypothesis tested?
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6. Should the hypothesis be supported or rejected based on the experiment? _____________________________
7. This experiment lead to the development of what major medical advancement?
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1ST PERIOD
BIOLOGY
Name: ____________________________________________________ Group:__________ Date:__________________
8. What is biology?
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Complete the graphic organizer to show the characteristics living things share.
9. The genetic molecule common to all living things is ___________________________________________________.
10. The internal process of _____________________________ enables living things to survive changing conditions.
11. Living things are capable of responding to different types of ___________________________________________.
12. Living things have a long history of ___________________________________________________________ change.
13. The continuation of life depends of both ______________________________ and __________________________.
14. The combination of chemical reactions that make up an organism’s ________________________________
help to organize raw materials into living matter.
1ST PERIOD
BIOLOGY