. Principles of modern biology. Biology. 77ie Plant Kingdom - 597. CHLAMYDOMONAS DESMIDS Fig. 31-2. Some green algae (Chlo- rophyta). Note the varied form, which may be unicellular, colonial, or multicellular. Also notice the nuclei and chloroplasts in the cells. Most green algae reproduce both sexually and asexually. ULOTHRIX (chlorophyll a and b, carotene, and xantho- phyll) are similar in the green algae and higher plants; and true starch is usually the intracellular storage product. The evolutionary status of the Chloro- phyta is still quite primitive, however. Only a few of the species ca
. Principles of modern biology. Biology. 77ie Plant Kingdom - 597. CHLAMYDOMONAS DESMIDS Fig. 31-2. Some green algae (Chlo- rophyta). Note the varied form, which may be unicellular, colonial, or multicellular. Also notice the nuclei and chloroplasts in the cells. Most green algae reproduce both sexually and asexually. ULOTHRIX (chlorophyll a and b, carotene, and xantho- phyll) are similar in the green algae and higher plants; and true starch is usually the intracellular storage product. The evolutionary status of the Chloro- phyta is still quite primitive, however. Only a few of the species can be regarded as multi- cellular organisms. That is to say, most of the species are either unicellular or merely colonial. And even the multicellular forms display a very limited differentiation of spe- cialized cells and virtually no differentiation of tissues. In the sea lettuce (Fig. 31-2), for example, each large leaflike lobe of the thal- lus, which resembles a piece of crinkled, green waxed paper, consists of only two layers of cells, all more or less alike; and the hold- fast (and stalk) consists mainly of elongate colorless cells arranged in the form of twisted strands. And finally, a relationship between. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Marsland, Douglas, 1899-. New York, Holt, Rinehart and Winston
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