Act I, Genetics and Evolution:
Assignment
Due Sep 24 at 11:59pm Points 5 Questions 19
Available after Sep 18 at 12am Time Limit None
Instructions
Welcome
Welcome to your Act I Assignment, where you will apply the knowledge and
skills you acquired in the Intergalactic Wildlife Sanctuary to 1) design an
experiment by randomizing subjects among treatments to evaluate a
relationship between two variables and 2) estimate the probabilities of
observing a specific genotype and phenotype among offspring.
NOTE: You can return to this page at any time while completing your
assignment.
How to begin
Click the "Take the Quiz" button to begin. After answering all of the questions,
please click "Submit" at the bottom of the page to submit your answers.
Additional information
You have only one attempt, so be sure you are satisfied with your work
before submitting your responses.
There is no time limit for this assignment.
You may work with your peers to complete this assignment, however you
must submit this assignment individually to receive credit. Even though you
are allowed to work with your peers, your answers must be in your own
words. (This means you are NOT permitted to copy and paste answers
with other students.)
How you'll be graded
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,9/24/23, 10:48 PM Act I, Genetics and Evolution: Assignment: BIO 100 The Living World (2023 Fall C)
This assignment is graded based on correct responses.
Due date
This assignment must be submitted by 11:59 PM Arizona Time on the due date
Remember, late assignments will not be accepted, so it is advisable to NOT wait
to begin your assignment.
Attempt History
Attempt Time
LATEST Attempt 1 27 minutes
Score for this quiz: 5 out of 5
Submitted Sep 24 at 10:48pm
This attempt took 27 minutes.
Appendix 1
Does the concentration of cadmium in the
Sarcannian water exceed the limit for healthy
life?
We cannot ignore the overlapping patterns between the areas where
sunstalks have died and the position of water pipes in the Sarcannian
forest. This observation suggests that heavy metals from the pipes might
have contributed to the death of the sunstalks. From studies on Earth, we
know that at high concentrations, heavy metals can kill an organism in
several ways. For example, many heavy metals bind to proteins in cells
and prevent these proteins from functioning. Other heavy metals trigger a
natural process of cell death, called apoptosis.
An artificial environment such as the Intergalactic Wildlife Sanctuary could
contain elevated levels of heavy metals. In fact, heavy metals make up a
fraction of the elements found in the structural framework of the sanctuary.
Given the corrosion that we observed on the water pipes, we might expect
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,9/24/23, 10:48 PM Act I, Genetics and Evolution: Assignment: BIO 100 The Living World (2023 Fall C)
that certain heavy metals have accumulated in the water used by the
sunstalks in Sarcannus.
The Intergalactic Wildlife Federation (IWF) follows the health and safety
recommendations of the Galactic Environmental Treaty, which limits the
concentrations of potentially harmful chemicals. This treaty specifies that
no heavy metal should exceed a concentration of 100 parts per million
(ppm) in water, which equals 100 mg of metal per liter of water (mg L-1).
Any concentration greater than this limit could harm an organism such as
a sunstalk.
One heavy metal we know can be particularly dangerous to life is called
cadmium (abbreviated in your periodic table as Cd). On Earth, cadmium
has a variety of uses, including being used to make certain batteries and
solar cells. My archives show that cadmium is one of several heavy
metals present in the infrastructure throughout the sanctuary -- so it
certainly has the potential to be present in the Sarcannian groundwater.
Your samples of water from the Sarcannian forest will enable us to
determine whether any type of heavy metal exceeds the recommended
limit for life. We’ll focus our initial analysis on cadmium given we know
how dangerous it can be to life.
We will follow three steps to answer the question “Does the concentration
of cadmium in the Sarcannian forest water exceed the limit for healthy
life?”
Step 1: Make predictions. Determine what observations you would
expect if the concentrations of cadmium in water samples exceed the
recommended limit. We need this to be able to compare the actual results
with, so that we can make a conclusion in Step 3.
Step 2: Determine whether the concentration of cadmium in water
exceeds the recommended limit. Determine whether the concentration
of cadmium in water likely exceeds the recommended limit of 100 mg/L.
This step gives us the evidence needed to make a conclusion in step 3,
when we will answer the question of whether an elevated concentration of
cadmium in water could lead to the death of sunstalks.
Step 3: Weigh the evidence and conclude if the concentration of
cadmium in the water could have caused the death of sunstalks.
Decide on an answer to the question “Could an elevated concentration of
cadmium have caused the widespread death of sunstalks in the
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, 9/24/23, 10:48 PM Act I, Genetics and Evolution: Assignment: BIO 100 The Living World (2023 Fall C)
Sarcannian forest?” Your argument should draw on your interpretations in
Steps 1 and 2.
APPENDIX 1, STEP 1: MAKE
PREDICTIONS.
To make a good conclusion, one must first predict what evidence is
needed to support it. In this assignment, you can choose between two
alternative conclusions:
1. Yes, the concentration of cadmium exceeds the limit for healthy life, or
2. No, the concentration of cadmium does not exceed the limit for healthy
life.
In each of these three figures in question 1 below, the y-axis represents
the probability of observing a concentration of cadmium less than the
corresponding concentration of cadmium on the x-axis. The x-axis
represents the concentration of cadmium (mg L-1), with higher values
indicating more cadmium per liter of water. The dashed vertical line
indicates the recommended limit of cadmium, 100 mg L-1. The curve
shows the normal probability distribution that best represents the
frequency distribution of the concentration of cadmium (mg L-1) in 20
samples taken from three different locations.
Use the information above and the figures below to answer question
1.
Question 1 0..25 pts
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