... -carotene, lutein, and zeaxanthin. All red algae reproduce sexually; a female egg is fertilized by a male sperm. It is not unusual for red algae to alternate between diploid and haploid generations. Agar, which is used to grow colonies of microorganisms, is extracted from rhodophytes; agarose is extracted from Gracilaria (Margulis 1998). Phylum Gamophyta Gamophytes are green algae that reproduce sexually, although they ... ...

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• Grade Level: Undergraduate