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KSA Science '22

Last updated about 2 years ago

7 questions

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Question 1

1.

Based on the change observed after the introduction of the sweetener to Mr. Smith's diet, which of these claims would it be reasonable to investigate?

Select two correct answers.

A change in the total number of bacteria might be the cause of his illness. 

A lower number of Lactobacilli might be the cause of his illness. 

A lower number of Bifidobacteria might be the cause of his illness.

An increased number of Bifidobacteria might be the cause of his illness. 

A lower number of Enterobacteria might be the cause his illness. 

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Question 5

5.

Which experimental result show on (Study Results) best supports the claim that the addition of artificial sweetener to Mr. Smith's diet is the cause of his illness?

In Trial 1, none of the bacteria could grow in the environment composed of 100% artificial sweetener.

In Trial 2, all the bacteria were able to grow equally in a mix of sugar and artificial sweetener.

In Trial 3, all the bacteria were able to grow equally in an environment composed of 100% table sugar.

In Trial 4, when the the three types of bacteria were fed the artificial sweetener, the Enterobacteria were less affected by the artificial sweetener.

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Question 6

6.

Which example from a different ecosystem best illustrates the situation happening inside Mr. Smith's intestine?

Flooding allows nonnative fish in a pond to escape into rivers and reproduce.

Runoff from mining inhibits grass growth, causing the moss population to increase. 

A slow change in climate causes established species to migrate to a different elevation.

A new predator migrates into an ecosystem, eats too many rabbits, and the fox population declines.

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Question 7

7.

Evaluate the treatment options. Explain which two treatment options you think are best and the reasons for your choices. Describe how important you considered each of the criteria listed (cost, benefit, negatives, mechanism) in deciding which treatment options were best.

Question 2

2.

Which of these claims about the impact of the sweetener could reasonably be investigated based on the pattern seen in the data?

Select two correct answers.

The artificial sweetener does not impact Enterobacteria but limits  Lactobacillus and Bifidobacteria growth.

The artificial sweetener limits growth of Enterobacteria, Lactobacillus and Bifidobacteria.

Artifical sweetener does not impact Lactobacillus and Bifidobacteria but limits Enterobacteria growth.

The artificial sweetener increases growth of Enterobacteria Lactobacillus and Bifidobacteria.

The artificial sweetener does not impact Lactobacillus and Bifidobacteria but limits Enterobacteria growth.

Question 3

3.

Which trial in the study was most likely performed to investigate the claim that a lower number of Lactobacilli and Bifidobacteria might be the cause of Mr. Smith's illness?

Trial 3

Trial 1

Trial 4

Trial 2

Question 4

4.

Which trial in the study provides the best evidence that the artificial sweetener functions as a low-calorie sugar substitute (i.e., does not provide usable carbohydrates) to Mr. Smith's intestinal bacteria population?

Trial 4

Trial 1

Trial 3

Trial 2