- Plants (4A)
differentiate between a monocot and a dicot seed?
MATERIALS: 24 hour soaked
corn and bean seeds, dilute iodine solution, 1 peanut in shell, hand lens or
- Examine the soaked corn seed your instructor has cut
in half. Add dilute iodine solution to one half of the seed. Make a careful
drawing of exactly what you see using a hand lens or a microscope.
- The part which turns blue-black is the endosperm, the
light purple area is the cotyledon. Be sure to label your drawing.
- Can you find the young leaves inside the seed?
How many are there?
Which part of the seed do you think is the seed
- 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 and
make an accurate drawing.
- Can you find the endosperm, young leaves (how many?) cotyledon?_______________, and seed coat?
- Try to open another corn seed like you did the bean
seed. Can you do it?
peanut, carefully illustrate the following sequence on the back of the paper:
1. the peanut with shell 2. the peanut in open shell. 3. a cut section of the
peanut (label seed coat, cotyledon, and endosperm) Is this a monocot or dicot?