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(A) Explain clearly the developmental and evolutionary significance of the neural crest within the phylum Chordata
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- During embryonic development, a neural crest would be found in all of the following chordates, except a. cephalochordates. b. reptiles. c. birds. d. mammals.Describe the phases of embryonic development in a chordate. Recognize the difference between a blastula and gastrula.Describe adaptations in the circulatory and neurosensory systems of cephalopods that are particularly valuable for actively swimming, predaceous animals
- Explain clearly The vertebrata is assigned the Subphylum taxonomic status with the phylum Chordata, which includes other subphyla of invertebrate animals. Explain the relationship between the Vertebrata and these invertebrates.Identify the stage(s) of embryonic development in whichcross sections of all chordate embryos closely resembleone another.Fill in the blanks with synapomorphic, symplesiomorphic, or neither Mesoderm is a ___ feature of chordates, and a ___ feature of vertebrates, but mesectoderm (neural crest) is a ___ feature of chordates, and a __ feature of vertebrates
- Identify the significance of gastrulation in the developmental process and compare gastrulation in the echinoderm (or in amphioxus), the amphibian, and the bird.Discuss how humans, as chordates, possess all fourcharacteristics either as embryos or adults.Describe the process of neurological development in a vertebrate embryo. B. Compare and contrast this process and the end result with that of a member of phylum cnidaria
- Briefly describe respiration and circulation in crayfishes. What are the tagmata of arachnids, and which tagmata bear appendagesCan the dorsal lip of the blastopore inducecells in another part of the amphibian embryoto change their developmental fate?Briefly describe some of the defining features of the birds, reptiles, amphibians and mammals classes within the phylum chordata