ScienceEngineeringMA 2. Chapter 1
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MA 2. Chapter 1

Zayd Foster avatar Zayd Foster
12 September 2022
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question
How many variables should be in a well-designed experiment?
answer
1
question
What was an important limitation in the experiments shown in the video?
answer
There were too few subjects. In other words, the sample size was too small.
question
In the essay, the point is made that perhaps the environment of the children has already guided their preferences in toys BEFORE the experiment was conducted. Given the choices below, what is the earliest age at which environment could potentially shape the preferences of a child?
answer
at age 3 or 4, when children are dressed in gender-specific clothing
question
Fraternal twins share _____ of the same genes, while identical twins share _____ of the same genes.
answer
50% on average; 100%
question
Which of the following experiments would provide the best data for determining the effect of environment?
answer
comparing identical twins raised in the same environment with identical twins raised in different environments
question
Which of the following experiments would provide the best data for determining the effect of genetics?
answer
comparing identical twins raised in the same environment with fraternal twins raised in the same environment
question
In the essay, the point is made that the right questions must be asked when designing an experiment that measures how genetics and environment "shape who we are." Which of the following measurements is probably the least valuable in such an experiment?
answer
the average lifespan
question
How does the level of trans fats in non-heart attack patients compare to the level of trans fats in heart attack patients?
answer
The trans fats level in non-heart attack patients is 84% of the level in heart attack patients.
question
Which three statements are supported by the data in the graph?
answer
Non-heart attack patient would have nearly 3g of trans fats in 200 g of adipose tissue, on average. Heart attack patients have higher levels of trans fats in their adipose tissue than non-heart attack patients. 1.77% of the total fat in heart attack patients is trans fats.