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Quiz/ Problem Set #1 WGECTW MOD 2 
Rubric Code: S2W3CX3
Ready to use
Public Rubric
Subject: Biology  
Type: Quiz  
Grade Levels: Undergraduate

Powered by iRubric Quiz/ PS #1
In the absence of phages, what does the growth of bacteria look like under conditions of low, medium or high resource availability (0.5pt)?
  Present

0.5 pts

Absent

0 pts

Not in use

(N/A)

Not in use

(N/A)

Q1

Present

The ideal answer has the three datasets generated by the model.
The screenshots should be included as per the instructions.All three screen shots present
Absent

No screen shots present. Add this note:

As per the directions, screen shots are required for this assignment. Rather than penalize you throughout, I will take off the credit for this question
Not in use
Not in use
Quiz/ PS #1 Q2
Based on these findings, what can you conclude regarding the relationship between nutrient availability and bacterial growth? (1.5 pts)
  Excellent

1.5 pts

Good

1 pts

Fair

0.5 pts

Poor

0 pts

Q2

Excellent

Excellent answers say that the levels of nutrients directly correlates with bacterial growth
Good

Good answers may get to this point, but do so in a round-about way.
Fair
Poor
Quiz/ PS #1 Q3
Under high resource availability, what does bacterial growth look like with a burst size of 2, 52 and 100? (0.5 pts)
  Excellent

0.5 pts

Good

0.25 pts

Poor

0 pts

Not in use

(N/A)

Q3

Excellent

Ideal: three screenshots, one for each condition.
Also accepted, a clear description of the three conditions

All three screen shots present or all three conditions described
Good

Some combination present but less than 3 (2 or 1 described)
Poor

None
Not in use
Quiz/ PS #1 Q4
How does the impact of phage on bacterial growth change under less than ideal nutrient levels? (1.5 pts)
  Excellent

1.5 pts

Good

1 pts

Fair

0.75 pts

Poor

0.5 pts

Q4

Excellent

Ideal: repeat the previous question by showing the same three phage bursts but at lower nutrients. (screen shots of words)

The best answers have a comparison to the high nutrient caseData and comparison
Good

Data, with no comparison,

OR
Comparing only one burst size between high and low nutrient conditions
Fair

Just a sentence that sort of gets at the comparison, but doesn’t have any data to back it up
Poor

No comparison made, but tried
Quiz/ PS #1 Q5
Based on these findings, what can you conclude regarding the relationship between nutrient availability the impact of phages on bacterial growth? (2 pts)
  Excellent

2 pts

Good

1.5 pts

Fair

1 pts

Poor

0 pts

Q5

Excellent

A new conclusion is drawn based on the modeling, that includes both variables; Ideal answer actually draws a relationship between nutrients and phages and how they impact bacterial growth
Good

There are two conclusions, and they are not really connected - but they match the modeling
Fair

The conclusions did not require the model to be drawn
Poor

No conclusions
Quiz/ PS #1 Q6- hypothesis
Based on these analyses, generate a hypothesis (proposed explanation made on the basis of limited evidence as a starting point for further investigation), and then explain the conditions you would use to test your hypothesis in the lab based on this modeling exercise (2 pts).
  Excellent

1 pts

Good

0.75 pts

Fair

0.5 pts

Poor

0 pts

Q6a

Excellent

A hypothesis is clearly stated. The hypothesis is specific, and could only have been generated from the data in the models.

The ideal answer is a specific hypothesis that is based on the data generated from the model
Good

A hypothesis was generated, but it is really general, making it hard to test.

A hypothesis was generated, but it doesn’t really take into account both variables, or it does so seperately
Fair

A hypothesis was generated that does not match the modeling data
Poor

No hypothesis is given
Quiz/ PS #1 Q6- conditions in lab
Based on these analyses, generate a hypothesis (proposed explanation made on the basis of limited evidence as a starting point for further investigation), and then explain the conditions you would use to test your hypothesis in the lab based on this modeling exercise (2 pts).
  Excellent

1 pts

Good

0.75 pts

Fair

0.5 pts

Poor

0 pts

Q6b

Excellent

The ideal experiment tests the hypothesis is a lab based experiment that tests the specific hypothesis, including both variables. So:
Both variables considered.
Well controlled,
lab based experiment.
Directly tests the hypothesis.
Discusses how you would measure the outcome
Good

Designed an experiment, with both variables. The description is a little vague.

These answers may suffer from a hypothesis that is too broad
Fair

Designed an experiment that only considers one variable, and does not consider them together.

Designed the model, but in the lab. These experiments could work for any hypothesis and were not specific
Poor

Proposed more modeling and not a lab experiment




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