A A Mesoderm Ectoderm Endoderm In the above diagram, there is an opening that has appeared on the right side of the developing embryo, creating an opening from the outside to th developing gut cavity. If this opening goes on to form the mouth in the fully developed animal, then this embryo would be an example of a If cells from the mesoderm of this embryo go on to develop into a lining for the body cavity, then this embryo would be an example of

A A Mesoderm Ectoderm Endoderm In the above diagram, there is an opening that has appeared on the right side of the developing embryo, creating an opening from the outside to th developing gut cavity. If this opening goes on to form the mouth in the fully developed animal, then this embryo would be an example of a If cells from the mesoderm of this embryo go on to develop into a lining for the body cavity, then this embryo would be an example of

Biology 2e

2nd Edition

ISBN:9781947172517

Author:Matthew Douglas, Jung Choi, Mary Ann Clark

Publisher:Matthew Douglas, Jung Choi, Mary Ann Clark

Chapter29: Vertebrates

Section: Chapter Questions

Problem 2VCQ: Figure 29.22 Which of the following statements about the parts of an amniotic egg are false? The...

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Endodermal Derivatives of the 10 mm Pig Embryo (SEE IMAGE) Position your slides such that the spinal cord appears uppermost in the field. Bear in mind that the position of the endoderm structures in the 72-hour chick embryo is essentially similar to that of the structures in thethe pig embryo although at this time there is no more midgut and anterior posterior intestinal portals. Concentrate on the structures that are appearing for the first time in the pig. Digestive and Respiratory Systems First pharyngeal or hyomandibular pouch and furrow: In a frontal section passing through the pharynx, the auditory vesicle and the ventralmost part of the hindbrain, observe the first pharyngeal pouch, with its thick endoderm lining and the furrow in the thin ectoderm. Note if there is a closing plate. At the anterior border of the pouch and furrow is the first visceral or mandibular arch just like in the chick embryo. Find the future Eustachian tubes, derivatives or the first pouch. Second…
Endodermal Derivatives of the 10 mm Pig Embryo (SEE IMAGE) Position your slides such that the spinal cord appears uppermost in the field. Bear in mind that the position of the endoderm structures in the 72-hour chick embryo is essentially similar to that of the structures in thethe pig embryo although at this time there is no more midgut and anterior posterior intestinal portals. Concentrate on the structures that are appearing for the first time in the pig. Digestive and Respiratory Systems First pharyngeal or hyomandibular pouch and furrow: In a frontal section passing through the pharynx, the auditory vesicle and the ventralmost part of the hindbrain, observe the first pharyngeal pouch, with its thick endoderm lining and the furrow in the thin ectoderm. Note if there is a closing plate. At the anterior border of the pouch and furrow is the first visceral or mandibular arch just like in the chick embryo. Find the future Eustachian tubes, derivatives or the first pouch. Second…
The cells that pull the archenteron through the blastocoel in the sea urchin are _____ cells called mesenchyme Group of answer choices A. mesoderm B. endoderm C. meroblastic D. macrolecithal
Which is the largest portion of an insect egg that contains carbohydrates,proteins and lipids?A. cytoplasmB. vitelline membraneC. yolk or deutoplasmD. chorion or egg shell When do many species of moths begin “calling “their mates?A. 1.5 to 2.0 hours after dawn.B. an hour before midnight.C. 1 to 1.5 hours before dusk.D. 1.5 to 2.0 hours before dawn. Which duct serves as a communicating tube between the oviducts & the vagina?A. lateral oviductsB. common oviductC. calyxD. pedicel Which of the following is a function of the follicular cells?A. uptake and deposition of nutrients and yolk in the oocyteB. selective uptake of nutrients from the hemolymphC. involved in the secretion of adhesive materialsD. serve to adhere the eggs to the substratum
Fluorescence Mapping of Blastomere in Sea Urchins Fate mapping is a technique that allows determination of the fate of cells from the three germ layers. In worms, the endoderm gives rise to the cells that line the intestines. The ectoderm gives rise to cells of the nervous system and body covering. The mesoderm gives rise to the muscles and other organs between the ectoderm and mesoderm. A researcher is tracing the fate of a particular cell (blastomere) from its position in one of the three germ layers of sea urchin blastulae by injecting a fluorescent tag in cells of the ectoderm, mesoderm, and endoderm. Several weeks later, the sea urchin embryos were analyzed for the presence of fluorescence in specific tissues. The following results were obtained. Tissue Percent increase fluorescence over background when dye is injected in the ectoderm Percent increase fluorescence over background when dye is injected in the mesoderm Percent increase fluorescence over background when dye is…
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Figure 29.22 Which of the following statements about the parts of an amniotic egg are false? The allantois stores nitrogenous waste and facilitates respiration. The chorion facilitates gas exchange. The yolk provides food for the growing embryo. The amniotic cavity is filled with albumen.
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?
The ___________________ of an egg serves as an embryos water supply while the ____________ provides a structure for gas exchange. A albumen; yolk B amnion; allantois C albumen; allantois D allantois; albumen
In mammals , the evolution/ development of the organs of the digestive system is closely related to a) the release of inducer molecules by specific cells b) the specialization of epithelial cells of the endoderm c) the specialization of neurocytes from the ectoderm d) the specialization of stem cells from the mesoderm to from blood vessels e) all of these occur as the digestive system develops
In protostomes and deuterostomes, the space between the endoderm and the ectoderm is important because:
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