germ layer present / levels of organization and coelom specimen type of animal based on number and organization of germ layer present (diploblastic, triploblastic) type of coelom (none, pseudocoelom, true coelom) scypha hydra dugesia ascaris earthworm How did the structural complexity change among phyla as the number of germ layers increased? Is there an advantage of having a mesoderm, why or why not?

germ layer present / levels of organization and coelom specimen type of animal based on number and organization of germ layer present (diploblastic, triploblastic) type of coelom (none, pseudocoelom, true coelom) scypha hydra dugesia ascaris earthworm How did the structural complexity change among phyla as the number of germ layers increased? Is there an advantage of having a mesoderm, why or why not?

Biology 2e

2nd Edition

ISBN:9781947172517

Author:Matthew Douglas, Jung Choi, Mary Ann Clark

Publisher:Matthew Douglas, Jung Choi, Mary Ann Clark

Chapter27: Introduction To Animal Diversity

Section: Chapter Questions

Problem 8RQ: Which of the following is not possible? radially symmetrical diploblast diploblastic eucoelomate...

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Developmental patterns between protostomes and deuterostomes Developmental Pattern Protostomes Deuterostomes Cleavage pattern Coelom development Fate of blastopore
Match the description given with either protostome or deuterostome or neither 1)spiral cleavage 2)blastopore becomes the anus 3)schizocoelous coelom formation 4)indeterminate cleavage 5)determinate cleavage 6)blastopore becomes the primitive streak 7)radial cleavage 8)enterocoelous coelom formation
A coelom (Gr. koilos, cavity) is a body cavity completely surrounded by mesoderm; the band of mesoderm with its internal coelom lies inside the space previously occupied by the blastocoel. How did this happen?
Reproductive characteristics and structures of sleected invertebrates and vertebrates. Fill in the blanks. SPECIMEN SEXUAL FORM EXTERNAL MORPHOLOGY GONADS ACCESSORY STRUCTURES Taenia solium Ascaris suum Pheretima Rhinella marina Mammalian model
Ecdysis is development of the epidermis from the ectoderm. molting of the exoskeleton. disintegration of the ectoderm. development of the ectoderm layer in the gastrula. the feeding tentacles of the Ecdysozoa.
Which of the following structures is not an extra-embryonic membrane of amniotes? Question 17 options: The allantois The pharyngeal cleft The chorion The yolk The amnion
Which if the following is true about the cleavage of Tunicates? Choose all possible answers exhibits a holoblastic cleavage earliest axis of symmetry in the embryo is not established until the second cleavage plane every cell division is asymmetrical from the 8th through the 64-cell stages. Prior to each cleavage, the posterior centrosome in the blastomere migrates to a centrosomesome-attracting body (CAB) holoblastic cleft is bilateral None of the choices are true about cleavage of Tunicates
What does the mesoderm have to do with the designation of a true coelom? A)The mesoderm gives rise to the fluid found within the coelom. B)The mesoderm gives rise to the floor of the coelom only C)The mesoderm has nothing to do with the coelom. D)The mesoderm gives rise to the structure of the coelom wall. E)The mesoderm gives rise to the coelom because it develops within the mesoderm
Cnidarians (and ctenophores) are diploblastic animals. What is the fate of the ectodermal and endodermal cells in cnidarians? Answer this by keeping track of structures /Nssues /cells of “organs” that are derived from the ectoderm or from the endoderm or both and by which group/taxa. Is there a common pattern for all or are there variations?
If activity of the organizer is inhibited, what does the embryo become? A mass of notochord. A mass of mesoderm. A mass of ventral tissue. A fully formed embryo.
Which of the following cell layers is not necessary to be considered a eumetazoan? a. Ectoderm b. Endoderm c. Mesoderm d. All of the above are found in all eumetazoans.
Spiral cleavage can occur in both deuterostomes and protostomes (True/False)?

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specimen	type of animal based on number and organization of germ layer present (diploblastic, triploblastic)	type of coelom (none, pseudocoelom, true coelom)
scypha
hydra
dugesia
ascaris
earthworm