Select all of the characteristics that apply to ALL of the Ecdysozoans. Select all of the characteristics that apply to ALL of the Ecdysozoans. Have a true coelom Shed skin during development Triploblastic Deutersome development Lophophore or trochophore during some point of lifecycle Protostome development
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Step 1: Define the group — Ecdysozoans are a monophyletic clade of protostome animals (examples: arthropods, nematodes, tardigrades, onychophorans, priapulids) whose unifying feature is ecdysis (molting of an external cuticle). Show more…
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Lophotrochozoans Which characteristics are included in the Lophotrochozoan grouping? (Check all that apply) - Coelom development - Trochophore larvae - Duterostome development - Outer covering that sheds
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Which group shows extensive segment specialization (tagmatization)? Nematoda Sipuncula Arthropoda Annelida Arthropoda AND Nematoda In which group would you look for a closed circulatory system? Annelida Crustacea Insecta Chelicerata all of these Which of the following is the trait that characterizes the Ecdysozoa - i.e., what is the unique or defining trait of this group? all have a coelom all have a pseudocoelom only ecdysozoans have a complete digestive tract all have a cuticle that they molt at some time in their life all are deuterostomes
The Parazoa are distinguished from other animal phyla (Eumetazoa) by ___. A. being haploid dominant B. lacking true tissues C. being radially symmetrical D. having no sexual reproduction E. being diploblastic Almost all of the major animal body plans (phyla) seen today appeared in the fossil record more than 500 million years ago during the ___ period. A. Cambrian B. Cenozoic C. Permian D. Cretaceous E. Carboniferous Ecdysis refers to ___. A. shedding an exoskeleton B. a distinctive type of larval stage C. a specialized feeding structure D. a specialized digestive process E. a specialized process for embryo formation Lophophores are ___. A. a distinctive type of larval stage B. a specialized feeding structure C. shedding an exoskeleton D. a specialized digestive process E. a specialized process for embryo formation Which of the following are protostome features? Mark two this question only. A. spiral, determinate cleavage B. radial, indeterminate cleavage C. enterocoelous (outpocketing) mesoderm formation D. schizocoelous (split ball) mesoderm formation
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