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annelid, phylum name Annelida, also called segmented worm, any member of a phylum of invertebrate animals that are characterized by the possession of a body cavity (or coelom), movable bristles (or setae), and a body divided into segments by transverse rings, or annulations, from which they take their name.
- What do all annelids share?
- What do annelids have that other worms dont?
- What are the characteristics of phylum Annelida and Arthropoda?
- What feature do we first see evolutionarily with annelids?
- What is the defining trait of the annelids?
- What are the characteristics of a Trochophore?
- What are some features that distinguish annelids from roundworms?
- What is a trait that differentiates annelids from nematodes?
- What are distinguishing characteristics of the nematode worms that are different from an annelid worm?
- What is the most distinguishing characteristic of annelids Why is it important?
- What are the salient features exhibited by Polychaetes Class 11?
- What are the differences between the three classes of annelids?
- What is the most important features of Arthropoda?
- Which of the following features is not present in the phylum Arthropoda?
- Which of the following characteristics are not present in the phylum Annelida?
What do all annelids share?
The Annelids are bilaterally symmetrical, triploblastic, coelomate, invertebrate organisms. They also have parapodia for locomotion. ... Each segment has the same sets of organs and, in most polychates, has a pair of parapodia that many species use for locomotion.
What do annelids have that other worms dont?
In addition to a more specialized complete digestive system, annelid worms have also evolved body features not found in flatworms or nematodes. These features appear in some form in all larger, more complex animals: a coelom, a body cavity between the digestive tube and the external body wall that is lined with tissue.
What are the characteristics of phylum Annelida and Arthropoda?
A distinguishing characteristic shared by annelids and arthropods is their body segmentation. At some point in development, segmented animals possess a body plan with repeating segments of identical or similar structures. Later in development, some segments may form more specialized structures.
What feature do we first see evolutionarily with annelids?
Coelom. An important evolutionary development in annelids, that is not obvious when you see the animal from the outside, is the presence of a well-developed coelom, or body cavity. Along with mollusks, annelids are among the first animals to have a coelom.
What is the defining trait of the annelids?
annelid, phylum name Annelida, also called segmented worm, any member of a phylum of invertebrate animals that are characterized by the possession of a body cavity (or coelom), movable bristles (or setae), and a body divided into segments by transverse rings, or annulations, from which they take their name.
What are the characteristics of a Trochophore?
trochophore, also called trochosphere, small, translucent, free-swimming larva characteristic of marine annelids and most groups of mollusks. Trochophores are spherical or pear-shaped and are girdled by a ring of cilia (minute hairlike structures), the prototroch, that enables them to swim.
What are some features that distinguish annelids from roundworms?
Annelids are segmented worms whereas roundworms are not segmented. Further, annelids have a true coelom while roundworms have a pseudocoelom. This means annelids have a well-developed mesoderm while roundworms lack a mesoderm. These are the main features that distinguish annelids from roundworms.
What is a trait that differentiates annelids from nematodes?
The main difference between Nematoda and Annelida is that Nematoda has a cylindrical body with tapered ends whereas Annelida has a cylindrical body, which is segmented. ... Most Nematodes are parasites in plants or animals while most annelids are free-living in the soil.
What are distinguishing characteristics of the nematode worms that are different from an annelid worm?
The key difference between nematodes and annelids is that nematodes are roundworms which are not segmented while annelids are true segmented worms. The presence and absence of a true coelom is another difference between nematodes and annelids. Nematodes possess a pseudocoelom while annelids possess a true coelom.
What is the most distinguishing characteristic of annelids Why is it important?
What is the most distinguishing characteristic of annelids? Why is it important? Segmentation; each segment has its own muscles that lengthen and shorten for efficient movement; groups of segments may take on specific function.
What are the salient features exhibited by Polychaetes Class 11?
It exhibits metamerism and segmentation. It possess closed vascular system. It has chain type of nervous system. The gametes created in a couple of specific portions are shed into the coeloem and leave the body through the nephridia.
What are the differences between the three classes of annelids?
PHYLUM ANNELIDA
Segments are formed from internal walls or septa, which divide the coelom into compartments. ... Class Polychaeta: marine annelids; Class Oligochaeta: marine, freshwater and terrestrial annelids including earthworms; Class Hirudinea: marine, fresh water and terrestrial leeches.
What is the most important features of Arthropoda?
The important characteristics of arthropoda include: They possess an exoskeleton. They have jointed appendages. Their body is segmented.
Which of the following features is not present in the phylum Arthropoda?
Thus, the correct answer is Parapodia which is not present in the Phylum-Arthropoda.
Which of the following characteristics are not present in the phylum Annelida?
But the animals belonging to phylum Annelida that have true or well-developed coelom are called coelomates. Thus being 'pseudocoelomate' is the only character not possessed by animals of the phylum Annelida. Hence, the correct answer is option A, i.e., Pseudocoelomate.
