Chapter3: Meat And Bones
Section: Chapter Questions
Problem 9MC
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Please I don't need an explanation. Just the answer.
read first and then answer the multiplication questions.
Transcribed Image Text:Multiple Choices. Direction: WRITE THE WORD OF the correct answer.
A. Read the description of Jose's science investigatory below. Then Answer the questions
that follow. Write the word/s of the correct answer.
Jose investigated the fungicidal ability of akapulko leaf extracts to kill the fungus that causes athlete's
foot. To extract the antifungal chemicals in the akapulko leaves, he used different liquids such as distilled
water, ethyl alcohol, coconut oil, and acetone. His investigations revealed that the fungicidal ability of the
akapulko leaves was most effective with the use of coconut oil as extracting liquid. He therefore
recommended the use of the akapulko leaves-coconut oil mixture for those suffering from athletes foot. He
also recommended that more study be done on other disease-causing fungi.
Jose further improved on his science investigatory project by quantifying the effectiveness of
akapulko leaves in inhabiting the growth of the fungus that causes athlete's foot. With the help of a
microbiologist, he performed the agar disc diffusion method, a laboratory procedure for determining the
effectiveness of an extract from the akapulko leaves to kill fungus. He did several trials to determine the
extract's effectiveness by measuring the diameter of the zone of inhibition of extracts against the fungus.
(The zone of inhibition is a clear round zone that can be observed in fungus-containing agar plate) The clear
zone on the agar plate showed that the fungus was not resistant to the akapulko extract.
Jose took several measurements (in millimeter) of the diameter of the zone of inhibition. Then he
compared the numerical data of the control set up consisting of coconut oil as the only inhibitory material.
Transcribed Image Text:6. Which served as the experimental units in Jose's investigation?
•Athlete's foot
•Akapulko leaves
•Antifungal effects of Akapulko leaves
•Fungi causing athlete's foot
7. When is a fair test observed in an investigatory process?
•When two or more independent variables are studied at the same time for their
effects on the experimental units.
•When only one independent variable is studied for its effects on a number of similar
experimental units.
•When only one independent variable is studied for its effect on a number of different
kinds of experimental units.
•When one dependent variable is analyzed based on the influence of a single factor.
8. Which reason explains why a control set up is necessary in a science investigation?
•The control set up is used as basis for comparing the results of the experimental setup.
•The control setup serves to validate or prove whether the changes in the experimental
units are brought about by the influence of the independent variable only.
•The control setup is used to assess experimental effects.
•All of the above
9. What do you think did Jose find out about akapulko from his science investigation?
•Akapulko leaves can be used to treat athlete's foot.
•lt is best to use liquids to extract the antifungal chemicals.
•The fungicidal ability of akapulko leaves is used in combination with coconut oil.
•Akapulko leaves can be used to treat other diseases caused by fungi.
10. What recommendations did Jose give based on his investigation?
•Persons suffering from athlete's foot can use the akapulko leaves-coconut oil mixture
to treat the condition.
•The study should be extended to include other disease-causing fungi.
•The akapulko leaves-coconut oil mixture can be used to make a topical ointment.
•Tests should be done to determine the antibacterial property of the akapulkoleavrs-
coconut oil mixture.
11. Take into account the second part of Jose's experiment. Why do you think did he
decide to take numerical measurements of the antifungal properties of akapulko leaves?
•To show that quantitative data gives more precise measurements than qualitative
data.
•To find out if a more scientific approach can give credible information.
•To confirm the effectiveness of the akapulko leaf-coconut oil mixture
•All of the above
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