Sunday, December 27, 2009

Monocots and Dicots

SEEDS


A Bean Seed is a Dicot.











Dicots are seeds that have two parts, such as a bean seed. A bean seed that has soaked in water for a day or two has a soft outside covering. This is the seed coat. The seed coat would probably slip off the seed easily. The bean seed has a slit going down the middle of the seed. Inside is a tiny plant called an embryo. The two large parts of the seeds are called cotyledons. They supply the food for the young plant when it's growing. The bean seed has two parts. Therefore, it is a dicotyledon, or dicot for short.

A Corn Seed is a Monocot.







Monocots are seeds that only have one cotyledon, such as the corn seed. The corn seed does have a seed coat, but it does not slip off as easily as the bean seed. The corn seed will not split like the bean seed. It stays in one piece. One cotyledon surrounds the embryo. It is lighter color than the rest of the seed and is called the endosperm. It provides food for the growing plant. The corn seed is a monocotyledon, or monocot. "Mono" comes from the Greek word monos, meaning "one".







Characteristics of Monocots








Characteristics of Dicots.



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