WebDec 3, 2024 · Polychaetes undergo external sperm transfer and external fertilization. But, oligochaetes undergo no external sperm transfer but their fertilization occurs in the clitellum or cocoon. Conclusion Polychaetes are … WebThe nereid polychaetes are free-moving predators that will consume large and small invertebrates using large proboscis jaws; they will also consume large amounts of detritus …
Annelid - Other internal systems and evolution Britannica
WebHow do polychaetes crawl? They move through the substratum by their peristaltic contraction movements. Circular muscles of these animals are well developed to assist in locomotion. How do Oligochaetes move? Oligochaetes have body segments with a small number of bristles called chaeta or setae. Webhow do polychaetes feed? Definition. some are carnivores some are sessile filter feeders: Term. what kind of muscles in polychetes: Definition. longitudinal and circular: Term. what do the oblique muscles control in polychaetes? Definition. parapodia feet: Term. what is an example of a scary polychaete? Definition. picture of a cheerleader
Zoology exam worms, jellies, sponges Flashcards
Polychaetes occur throughout the Earth's oceans at all depths, from forms that live as plankton near the surface, to a 2- to 3-cm specimen (still unclassified) observed by the robot ocean probe Nereus at the bottom of the Challenger Deep, the deepest known spot in the Earth's oceans. See more Polychaeta is a paraphyletic class of generally marine annelid worms, commonly called bristle worms or polychaetes (/ˈpɒlɪˌkiːts/). Each body segment has a pair of fleshy protrusions called parapodia that bear many … See more Polychaetes are extremely variable in both form and lifestyle, and include a few taxa that swim among the plankton or above the abyssal plain. Most burrow or build tubes in the sediment, and … See more Most polychaetes have separate sexes, rather than being hermaphroditic. The most primitive species have a pair of gonads in … See more • Aelosoma • Edith Berkeley • Australonuphis See more Polychaetes are segmented worms, generally less than 10 cm (4 in) in length, although ranging at the extremes from 1 mm (0.04 in) to 3 m (10 ft), in Eunice aphroditois. … See more • One notable polychaete, the Pompeii worm (Alvinella pompejana), is endemic to the hydrothermal vents of the Pacific Ocean. Pompeii worms are among the most heat-tolerant … See more Stem-group polychaete fossils are known from the Sirius Passet Lagerstätte, a rich, sedimentary deposit in Greenland tentatively dated to the late Atdabanian (early See more WebPolychaetes are a diverse and abundant group of segmented worms. They are commonly known as bristle worms because of their characteristic hairs called 'chaetae'. Polychaetes are mainly found in the marine environment, from shallow waters down to the depths of deep-sea trenches. Currently over 13 000 polychaete species have been scientifically ... WebFilter Feeding in Polychaetes. Polychaetes have long bipinnate filaments or tentacles called radides on their heads, with a ciliated groove running along their oral surface. Filter … picture of a check valve