Download monocot and dicot lab

There are 2 basic types of plants...monocots and dicots. Each group displays differences in
leaves, stems, roots, flowers, and seeds. You will observe seed differences between 2 different
plants. The stem differences will be analyzed through microscopic study of preserved stem
tissue. In addition, you will also research other differences between monocots and dicots.
PRE-ACTIVITY: Define monocot and dicot. Research to determine the differences between
monocots and dicots. Construct a chart and show differences between seeds, leaves, roots,
flowers, and stems of monocots and dicots. Each person does this and during the lab you will
take the information and share it on the team page. You can use your computer or hand
write. Use your book or the Internet.
PROBLEM: Can you differentiate between a monocots and dicots?
MATERIALS: 24 hour soaked corn and bean seeds, dilute iodine solution, 1 peanut in shell,
hand lens, microscope
PROCEDURE: Place all of the information on your team page. Take pictures and place a
caption below each picture (captions tell what the item is and what you learned/its
importance, etc. Label the parts required on your picture before uploading.
CORN SEED
1.
Cut a soaked corn seed in half. Add dilute iodine solution to one half of the seed. The
part which turns blue-black is the endosperm, the light purple area is the cotyledon. Take
a picture and be sure to label these for your team page.
2.
Answer the following on your team page: Can you find the young leaves inside the seed?
How many are there? Which part of the seed do you think is the seed coat?
BEAN SEED
1.
Carefully remove the seed coat from the bean seed and examine what you find. Separate
the two halves of the bean seed with your fingers. Be careful you don't damage the
sample. Again, apply dilute iodine solution to one half. Find the endosperm and
cotyledon. Take a picture and label those for your team page.
2.
Can you open a corn seed like you did the bean seed. Can you do it? Why or why not?
PEANUT SEED:
Show the following using pictures:
1.
a cut section of the peanut (label the seed coat, cotyledon, and endosperm)
2.
Is this a monocot or a dicot?Why?
STEM SLIDES:
Examine both a monocot and a dicot microscope slide showing a cross section of the stem.
Take pictures of each slide using the motic camera (directions are found in the resources
section of the wiki.) Label the pictures with the structures seen (epidermis, cortex, xylem,
phloem, and pith). Insert the images into the wiki page (remember to name the pictures
uniquely to prevent overwriting by others.) What are the differences between monocot and
dicot stems? What is the function of each of these tissues?
LEAF EPIDERMIS SLIDE:
Take a picture of the leaf epidermis and label the Stomata and the guard cells.
HERBACEOUS AND WOODY STEM SLIDE
Answer the following: What is the difference between an herbaceous and a woody stem?
Research two examples that are monocots and 2 that are dicots for both herbaceous and
woody stems. Extra credit: Capture a microscope image of an herbaceous and a woody
stem. Label any parts that show the differences between them.