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Objective Central
Concept Standards
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here Materials
Dicussion Questions Do all plants have flowers? Can you name a plant that does not have a flower? (If students list plants in the latter category that do have flowers, such as an oak tree, collect a sample, or use photographs to show the variations in flower shapes.) Do all plants have fruits? Can you name a plant that does not have a fruit? Do all plants
have seeds? Can you name a plant that does not have seeds?
(ferns, mosses) Activity The word gymnosperm means "naked seed," which refers to the fact that the seeds are produced in a cone structure rather than being enclosed in a flower/fruit like angiosperms. Some common characteristics of gymnosperms include:
As always, there are exceptions to every rule. For instance, the gingko is a gymnosperm, but it is deciduous and has broad leaves. Angiosperms produce their seeds in enclosed fruits. Common characteristics include:
Exceptions exist here, too. Many trees and grasses, which are angiosperms, are pollinated by wind. Provide samples
of plant parts from gymnosperms and angiosperms and ask students
to fill out the following plant comparison
chart:
Extension Science: Take a nature walk around your school or home. Look for angiosperm and gymnosperm plants along your way. Bring a guide book to help confirm your identification.
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