vs.
Earlier in the unit, we learned that angiosperms can be divided into monocots and dicots. There are many differences between the two!
Using figure 17.10 on pg. 562 in the text, draw a picture of a monocot seed and a dicot seed: (also check the chart on pg. 531)
Monocot Dicot
Make sure you have the following terms labeled on your diagrams above:
Cotyledon : structure in the embryo of a seed plant that may form a ‘leaf’; also known as a seed leaf
Endosperm : the nutritive tissue within seeds of flowering plants, surrounding and absorbed by the embro
Seed coat : outer protective coating of the seed
Plumule : terminal bud of a plant embryo
Radicle : the part of a plant embryo which develops into a root
What are the main differences between the seed of a monocot and dicot? ___________________________
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Lab portion: Obtain a pre-soaked corn and bean seed. Carefully slice each one lengthwise with a scalpel. Identify the cotyledons in each of the two types of seed. Keep these seeds for later.
Monocot and dicot seeds grow very differently as well:
1. Using pg. 562, discuss the trigger for germination in both monocot and dicot plants. _________________
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2. Using figure 17.12 on pg. 563 as well as your own bean and corn plants. Draw a diagram to help explain the differences between how a monocot and dicot grow. (you may have to dig out your corn seed to see it)
Monocots (corn) Dicots (bean)
The vascular bundles in the stems of monocots/dicots distribute differently. Using Figure 16.9, page 534 in the text, explain and draw the differences between the two:
Monocots Dicots
Using pg. 531, how do the roots compare between monocots and dicots? ___________________________

Using the chart on pg. 531 explain how leaves form differently on monocots and dicots. Draw a picture to help you:
Monocots Dicots
**Lab portion: Examine the leaves set aside in the classroom. Which ones are monocots and which are dicots? Draw their leaves under the appropriate heading below:
Monocots Dicots
How can you tell from the flower whether a plant is monocot or dicot? Use the chart on pg. 531 to assist you: _______________________________________________________________________________
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Label the pictures below as monocots or dicots:
**Lab portion:
1. Using your already pre-soaked and sliced seeds from the first section, add a few drops of Lugol’s solution to the exposed inner surfaces of each section. Recall from our first unit that Lugol’s solution turns black if there is starch present.
2. Make a labeled diagram of each section and indicate the location of starch:
Monocot Dicot