Problem 1
Answer: C) Does studying hard make a student a good person?
This is an example of a question that cannot be investigated by scientific inquiry. This is because of the vague definition of "good", and "good" is a subjective concept (in contrast to an objective fact).
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Problem 2
Answer: D) Centriole
I recommend going to the Cells Alive website to check out the plant cell interactive diagram. In there, you can click on various parts of the cell to see where they are located and what the object does. If you clicked on "centriole", then it would say "plants do not have centrioles".
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Problem 3
Answer: B) Diseases that rely on transmission from one person to another tend not to be quickly disabling to the victim
The idea is that the disease with a longer incubation time tends to spread further compared to diseases with shorter incubation times. If a certain disease kills a person or animal very quickly, then that disease will not spread as much (since either the person/animal is dead, or will be quickly quarantined). Contrast this with a person/animal where symptoms do not present, so other people/animals will come in contact with the carrier, allowing the disease to spread more easily. So these types of diseases will be more common and survive easier compared to the lower incubation diseases. Of course, this does not mean diseases that kill quickly are not completely wiped out.
