Chapter 5 - Assignments(Print this document to use as a reference for completing Chapter 5 Assignments.)Read the materials for chapter
5: Roots |
Return to Top Go to grading rubric for this assignment
Return to Top Go to grading rubric for this assignment
Roots are of economic value. Search the Internet or go to a local grocery store and discover at least 10 plant roots that are sold in the produce department. Think back to the food that you have eaten this month. How many meals and/or snacks did you have that contained roots as a part of the meal/snack. Make a list of all the different roots you personally have eaten this month. Which did you like? Which did you eat only because you were told to? Which did you refuse to eat? If you have eaten no roots, talk to the person who prepares your meals and ask why there were no roots? Record that information instead.
Go to the class discussion board. Click the thread for Edible Roots. Read the postings of your classmates. Do not copy another's work, but make a posting based on your own experiences.
Your posting must be complete and must use good grammar.
Return to Top Go to grading rubric for this assignment
Click here to see a class as it completes the lab
In addition you can use the sites given in the Course Companion: Web links section above to see the type of things you could see if you did this assignment in a lab.
Answer the questions in your lab book for Lab 4 Roots. Be certain that in addition to answering the Review and Quiz questions you also put the labels on the diagrams since you will have labeling questions on the quiz as well as other questions. Half of the quiz will be selecting the correct labels on the diagrams in your lab book.
Return to Top Go to grading rubric for this assignment
There will be a 20 question quiz for each chapter. The quiz is open book and notes, but it is timed and you will only have 15 minutes to answer the 20 quiz questions. However, you may take the test as many times as you want. Each time to take the quiz, you will be presented with 20 questions randomly selected from the chapter test pool. NOTE: For the midsemester exam you will NOT be allowed to use notes or take the exam more than once, but the questions will come from the test pools for chapters 1, 3,4, 5, and 6.. To take the chapter quiz,
|
Activity | Points awarded |
| Terms Quiz (1-5 depending on your score) | 5 |
| Weblinks: Summary is grammatically correct with three specific
statements , name of the reading, the URL in your summary. -1 for each
thing missing 2 additional points for the reply to another student with 2 interesting items. 1 for 1 | 8 2 |
| Edible Roots
grammatically correct, answer
complete. -1 point for EACH item missing | 5 |
| Lab work depending on quiz score (1 - 10) | 10 |
| Chapter quiz: | 20 |
In this lab you will work with roots. At the end of this lab the successful student will be able to
Return to top Return to the Lab Work
Read Section A: Root Hairs in the Lab book (p. 27), look at the illustration on p. 29 to see how root hair actually look and work by increasing absorption. Notice the close-up at the top of the page. Look at the microscopic view at the lower left of your page. This is what you ought to see looking at the root cells emerge from an epidermal cell. Now lets look at some slides resembling what you would have seen in the actual lab.
Look at radish seeding
Focus in on a root. You will see something like this
In our lab, the radish sprouts looked like this:
They had been placed on the vermillion pads 7 - 10 days before our lab and
watered to produce the sprouts. When we set up our Lab, the materials
table looked like this:
You can see our radish roots, the jar of pond water, and the boxes of prepared
slides. Although we prepared our own slides with the radish roots, we used
prepared slides for the cell images. Here we are preparing the radish
roots for more thorough observation under the microscope:
This is an image of the radish roots that one student found.
You can see the hairs growing on the side. This student is adjusting his
microscope to get a good clear image of the root hair:
Here are the root hairs he was able to find on his radish sprout:
.
Here is a student who is drawing the root he saw in his microscope.
Return to start of lab example Return to top Return to the Lab Work
Read Section B: Dicot Roots in your lab book(p.27) . Diagram 31 in your lab book will show how the microscopic cross section of the root would look under high power magnification. Locate the following structures and label them.
You need to know all the structures shown here. In addition, you should know that the large red dye circle surrounding the "wagon like wheel" of the xylem is the casparian strip.
Here are
some of the cells we observed in our lab:
Some students use graphing paper to draw there observations of cells:
Return to start of lab example Return to top Return to the Lab Work
Read Section C in your lab book (p.28) Diagram 33 in your lab book will show how the microscopic section of the root would look like under high power magnification. Locate the following structures as seen on text figure 5.3B p. 66 and label them. Note also the pith is NOT found in the dicot root.
This student could not find the Monocot root cells on her slide. The
instructor showed her how to focus her slide on the correct structures to be
observed.
This is what the monocot root looks like at low power: 10x objective =
100x magnified
Once the structures were visible at this power the student was able to move to
the High power to look at the specific structures within the root endodermis.
Note the clarity of the needed structures to observe are not visible under low
power magnification. Using High Power Magnification 40x= 400 times
magnified the student was able to see much more detail in the endodermis and
specifically see the monocot root pith (within the pointer).
Here you can see another student who is carefully holding the BASE of his
microscope while adjusting the fine focus to grab his image at high power.
This student is adjusting the course focus with his right hand and the fine
focus with his left hand to increase the sharpness of the image of the specimen
he is using.
Return to start of lab example Return to top Return to the Lab Work
Carefully Read Section D. Lateral Root in your lab book p. 28. In addition, observe Figures 5.6 and 5.7 in your text. Using these text figures can you identify the following structures
Here is a student looking at a lateral root
This is what she saw
Return to start of lab example Return to top Return to the Lab Work
Using the text illustration on Figure 5.2A locate the zone of Apical Meristem (region of cell division). Using High power magnification you will be able to locate and view the stages of Mitosis.
This is figure 5.2:
Return to start of lab example Return to top Return to the Lab Work