The Chlorophyceae are one of the classes of green algae, distinguished manly on the basis of ultrastructural morphology. The following orders are typically recognised:
In older classifications, the term Chlorophyceae is sometimes used to apply to all the green algae except the Charales, and the internal division is considerably different.
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... the population is spread out with 20.5% under the age of 18, 6.1% from 18 to 24, 24.6% from 25 to 44, 28.2% from 45 to 64, and 20.7% who are 65 years of age or older. ...