Kingdom Euglenozoa - chloroplasts resemble those of green...

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Kingdom Euglenozoa This proposed kingdom includes protists with one or two flagella emerging from an anterior pocket, and paramylum (a glucose polymer) as the storage product for sugars. Some members of this group are are autotrophic, while others are heterotrophic. Phylum Euglenophyta Organisms in the Euglenophyta have two flagella, a contractile vacuole , a photoreceptive eyespot, several chloroplasts, lack a cell wall, and can live as either autotrophs or heterotrophs. Some autotrophic species of Euglena , such as the one shown in Figure 5, become heterotrophic when light levels are low. Their chloroplasts are surrounded by three rather than the more typical two membranes. Euglenoid
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Unformatted text preview: chloroplasts resemble those of green algae, and are probably derived from the green algae through endosymbiosis. However, the euglenoid pyrenoid produces an unusual type of carbohydrate polymer (paramylum) not seen in green algae. Euglenoids lack cell walls. In its place, however, is a flexible pellicle composed of protein strips side. Euglenoids also have a contractile vacuole, like many other protists, for eliminating excess water. Euglenoids reproduce by longitudinal cell division, and sexual reproduction is not known to occur....
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