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124L Fall 2014
Homework 2: Cell Structure and Biological
Membranes
1.
Name two
components that are present in plant cells but absent in animal cells. What is
the function of each of the components? (1 pt)
2.
What
cellular structure do cells from an Elodea
leaf have that cells from an onion bulb do not?
Why is this the case? (1 pt)
3.
Describe
what happened to the cells from an Elodea
leaf when you added salt water to them.
Why did this happen? (1 pt)
4.
Does liquid
dye diffuse faster in hot or cold water? Explain why. (1 pt)
5.
In the
experiment with decalcified eggs, describe what happened to the mass of each
egg over time. Why did the mass of each
egg change? Correctly use the following words in your
answer to receive full credit: osmosis, tonicity, hypertonic, hypotonic. (1 pt)
Biology 124L
Fall 2014
Homework 2: Cell Structure and Biological
Membranes: Answer Sheet
Please
type answers in the spaces provided below, print, and turn in at the beginning
of lab.
Due Date: The beginning of your scheduled lab during
the week of September 8th.
Name:
_________________________________________ Section: ____________
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