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What are annelids classified as?
The annelids traditionally include the oligochaetes, which include the earthworms and leeches, the polychaetes, which are a marine group, and two other smaller classes. The phyla Mollusca and Annelida belong to a clade called the Lophotrochozoa, which also includes the phylum Nemertea, or ribbon worms ( [link]).
What is the difference between annelids and leeches?
Significant differences between leeches and other annelids include the development of suckers at the anterior and posterior ends, and the absence of chaetae. Additionally, the segmentation of the body wall may not correspond to internal segmentation of the coelomic cavity.
What phylum are Mollusca and Annelida in?
The phyla Mollusca and Annelida belong to a clade called the Lophotrochozoa, which also includes the phylum Nemertea, or ribbon worms ( [link]). They are distinct from the Ecdysozoa (nematodes and arthropods) based on evidence from analysis of their DNA, which has changed our views of the relationships among invertebrates.
What are the 7 classes of phylum Aplacophora?
This phylum is comprised of seven classes: Aplacophora, Monoplacophora, Polyplacophora, Bivalvia, Gastropoda, Cephalopoda, and Scaphopoda. Class Aplacophora (“bearing no plates”) includes worm-like animals living mostly on deep ocean bottoms. These animals lack a shell but have aragonite spicules on their skin.
The Plants \u0026 The Bees: Plant Reproduction – CrashCourse Biology #38
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1. Question 18 of 33 Which is an example of an Annelid that is …
Jul 21, 2020 · See Page 1. Question 18 of 33 Which is an example of an Annelid that is monoecious with permanent gonads? A. cuttlefish B. crocodile C. earthworm D. starfish E. orangutan. Feedback: Great job.
2. Mollusks and Annelids – Concepts of Biology
Apr 25, 2013 · The chaetae are a defining character of annelids. Polychaete worms have paired, unjointed limbs called parapodia on each segment used for locomotion and breathing. Beneath the cuticle there are two layers of muscle, one running around its circumference (circular) and one running the length of the worm (longitudinal).
3. Annelida Flashcards – Quizlet
most ancestral annelids; basal to other two classes. Clade Polychaeta clades. Clade Errantia, Clade Sedentaria. Clade Errantia. errant worms, free-living, predatory. … -most have sexual reproduction and monoecious-permanent gonads in male and female reproductive systems-external fertilization-eggs laid in cocoon-no free living larva.
4. Chapter 11 Annelids Flashcards | Quizlet
a class of mostly freshwater annelid worms with dorsoventrally flattened, thick muscular bodies, a limited number of segments, and anterior and posterior suckers; no head or tentacles at their anterior ends and lack parapodia and setae; monoecious, with …
5. Annelids Flashcards – Quizlet
permanent gonads (monoecious) Clitellum swollen region closer to head band of thickened, specialized segments in annelids that secretes a mucus ring into which eggs and sperm are released (cocoons for fertilized egg) Oligochaeta (subclass) freshwater and terrestrial few setae lack eyes (diffuse photo and chemoreceptors) photoreceptors
6. Zoology: Chapter 17: Annelids Questions/Answers – Quizlet
Compare/contrast these 2 classes and provide examples of organisms included in each class. -Polychaeta. * Means many setae, largest group, marine, many parapodia, lack clitellum, and permanent gonads, mostly dioecious. *Clamworms, sandworms, fanworms, scaleworms, lugworms, and tubeworms. -Clitellata.
7. Question 15 of 33 which is not part of the stamen of
Question 18 of 33 Which is an example of an Annelid that is monoecious with permanent gonads? A. crocodile B. orangutan C. earthworm D. cuttlefish E. starfish
8. Question 8 of 31 30 points double fertilization is – Course Hero
Part 3 of 8 – Chapter 15 18.0 Points Question 13 of 31 3.0 Points Which is an example of an Annelid that is monoecious with permanent gonads? A. orangutan B. earthworm C. …
9. Chapter 17: Annelids and Allies Flashcards | Quizlet
annelids and allies are. coelomate postostomes. schizocoely. the method of coelom formation in protosomes in which the embryonic mesoderm splits into two layers. prostostomes. mouth develops first. phylum annelida. – segmented worms; divided into metameres. – rings called annuli.
10. SCIN130 Quiz 6.docx – Course Hero
Hide Feedback Great job. What are two defining characteristics of prokaryotes? Question options: multicellular, lacking nucleus single-celled, has nucleus …
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