2 out of 2 points
Exercise 3 "DO or Die," question 3.1: When zooplankton and trout were added to
the system, dissolved oxygen levels remained higher than in the system with
only phytoplankton.
Selected Tru
Answer: e
Correct Tru
Answer: e
Question 2
2 out of 2 points
Exercise 3 "DO or Die" Check your understanding: Dissolved oxygen levels are
the lowest near the bottom of the lake where phytoplankton (algae) are being
decomposed, so bottom dwelling organisms are the most susceptible to algal
blooms.
Selected Tru
Answer: e
Correct Tru
Answer: e
Question 3
2 out of 2 points
Exercise 1 "Starting Up," question 7.3: Based on your sampling, what do Trout in
the lake eat? Also refer to the following question (#8) in Starting Up for a hint.
Selected
Answer:
Bosmina & Daphnia
Correct
Answer:
Bosmina & Daphnia
Question 4
2 out of 2 points
Exercise 2 "P in the Water," question 6.4: On your graph of Phosphorous levels
(x-axis) versus Dissolved Oxygen concentration (y-axis), how would you describe
the relationship of these variables?
Selected
Answer:
As Phosphorous in the system increased, the Dissolved Oxygen
concentration decreased.
Correct
Answer:
As Phosphorous in the system increased, the Dissolved Oxygen
concentration decreased.
Answer Right, as Phosphorous increases, there are more Geen Algae, and it
Feedback:
uses up the dissolved oxygen to decay them when they die.
Question 5
2 out of 2 points
Exercise 4 "Toxins!" question 3.4: The graph constructed in this experiment does
show evidence of biomagnification in this lake.
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