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12. Life
| 12.30 |
Advanced mono-cellular destructive attractor
ATTRACTORS(protozoa-mastigophora)
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| Trypanosoma, Trichomonas, Codosiga | ||
| Euglenoids, common name for microscopic, plant-like, single-celled organisms such as those of the genus Euglena, common in freshwater habitats but sometimes found also in marine environments. Traditionally, euglenoids have been treated as algae, or simple plants, because they are frequently photosynthetic. Zoologists, however, have considered them simple animals because they can swim and because some feed like animals. Thus, they have been considered transitional between plants and animals. They are currently classified in the phylum Euglenophyta in the kingdom Protoctista. | ||
| A typical euglenoid has a pair of flagella, or thread-like structures used in swimming, at the front end. It also executes a kind of crawling movement by changing the shape of its body. An eye-spot enables it to move towards or away from light. Photosynthetic euglenoids contain several bodies, called chloroplasts, that give them a greenish colour and enable them to photosynthesize. Some euglenoids feed by taking up dissolved substances, and a few can ingest larger materials such as other euglenoids. The animals reproduce asexually by binary fission, or dividing in two, and little evidence of sexual reproduction exists. | ||
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