Q: What selective forces might limit the stage of development at which humans are born?
A: Introduction: The evolution of humans are influenced by the following five factors: Natural…
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A: The process called gastrulation is the most characteristic event occurring during the third (3rd)…
Q: umbilical cord is formed from the chori
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Q: What is the advantage of external fertilization over internal fertilization
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A: The early stage in the development of the embryo is referred to as gastrulation. Gastrulation is a…
Q: The formation of three germ layers is called Select one: a. gastrulation b. pluripotency c.…
A: A zygote is the fertilized egg that is formed by the fusion of the egg and the sperm via the process…
Q: External fertilization occurs in which type of environment? a. aquatic b. forested c. savanna d.…
A: “External Fertilization” is a process of reproduction in which the “male gamete” (sperm) and the…
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A: Here, we have to select the incorrect statement regarding development.
Q: After the zygote undergoes several mitotic divisions, the resulting structure that implants in the…
A: Fertilization is the process in which gametes fuse to form a zygote. The zygote undergoes several…
Q: Which primary germ layer gave rise to the cells that eventually became the central nervous system?…
A: Introduction Life starts from single cell called Zygote. Zygote is the single diploid cell resulted…
Q: only symmetric cell division whereas oogenesis involves asymmetric cell division
A:
Q: Which of the following rows correctly identifies the development of the germ layers? Select one: a.…
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A: Introduction: Somites can be defined as the longitudinal series among other series of blocklike…
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Q: O Occurs in protostomes and involves mesodermal tissue that is located in the space between the…
A: Ans- Occurs in protostomes and involves mesodermal tissue that is located in the space between the…
Q: 4. Sarcomas and hematopoietic cancers are both derived from which germ layer? A. Ectoderm B.…
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Q: Among the germ layers and developmental structures below: What is/are the FORMED ANATOMICAL…
A: Introduction Embryonic development is also called embryogenesis. It is the process where development…
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Q: Which of the following is not true about neurulation? Choose all possible answers. a. Segregation…
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Q: In embryos with spiral cleavage the 4d cell gives rise to which germ…
A: INTRODUCTION Mesoderm It is a germ layer formed during gastrulation. Present between ectoderm and…
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Q: Compare and contrast external versus internal fertilization. Describe at least three major…
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Q: What structures are derived from the ectoderm, mesoderm, and the endoderm?
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A: Placenta is a organ that connects the mother's uterus with baby's Umbilical cord.
Q: What are the advantages and disadvantages of internal fertilization over external fertilization? How…
A: Internal fertilization - It is the fusion of egg and sperm during sexual reproduction inside the…
Q: During the embryonic developmen, the trophoblast will developed into Select one: A. The embryonic…
A: Developmental biology focuses on the study of developmental sequences of organisms. The embryonic…
Q: What are the 4 major events comprising the process of fertilization?
A: Note: As Per Bartleby Guidelines only one question is answered. For further answers repost the…
Q: Which of the following correctly lists the germ layers of an embryo? O A. exoderm, mesoderm,…
A: Step 1 Embryonic development or embryogenesis is the development of the embryo from the fertilized…
Q: Which of the following statements is NOT correct about the umbilical cord? a. The umbilical cord…
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Q: What organ does the somatic hypomere originating from the general mesoderm give rise to? a.…
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Q: atch the germ layer on the right with its contribution to the tissues and organs of the embryo, on…
A: Endoderm, ectoderm, and mesoderm are the three germ layer types. Tissues and embryonic organs…
Component of bilaminar germ disc:
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- Define and describe the main features of the following developmental stages: fertilization, cleavage, gastrulation.Match the germ layer on the right with its contribution to the tissues and organs of the embryo, on the left. v connective tissue stroma A. mesoderm v parenchymal cells, e.g., liver B. ectoderm C. mesoderm D. mesoderm E. endoderm F. endoderm vasculature v innervation v epithelium of enteric secretory duct tubes v epithelium of integumentary system G. ectoderm v elastic membraneSomites develop froma. paraxial mesoderm.b. intermediate mesoderm.c. lateral plate mesoderm.d. head mesenchyme
- Gastrulation does NOT Select one: a. involve the formation of germ layers b. consist of endoderm, mesoderm, and ectoderm c. result in the formation of a third layer in the embryonic disk d. include the differentiation of cells into tissues and organsWhat controls whether an embryo will develop testes or ovaries?a. pituitary glandb. hypothalamusc. Y chromosomed. presence or absence of estrogenA gastrulation does NOT Select one: A. Consist of endoderm, mesoderm, and ectoderm B. Result in the formation of a third layer in the embryonic disc C. Involve the formnation of germ layers D. Include the differentiation of cells into tissues and organs
- Which of the following statements does NOT correctly describe the events following fertilization? Select one: a. Only the inner cell mass cells in a blastocyst are pluripotent. b. The trophoblast has an important role in maintaining the pregnancy, as it prevents the endometrium from shedding. c. As hCG takes over maintaining the endometrium immediately after implantation, the corpus luteum degenerates into the corpus albican. d. All 16 cells in a morula are truly totipotent, meaning that they can become any cells in the human body.Which of the following rows correctly identifies the development of the germ layers? Select one: A. Endoderm Mesoderm Ectoderm Placenta Muscle Hair and nails B. Endoderm Mesoderm Ectoderm Stomach and intestine Lining Reproductive system Brain and Spinal Cord C. Endoderm Mesoderm Ectoderm Muscle Bones Epidermis D. Endoderm Mesoderm Ectoderm Lungs and stomach linings Heart and Lungs Liver and pancreasWhich of the following statements is NOT correct about the umbilical cord? Select one: a. The umbilical cord is formed from the chorion. b. The placenta connects to the embryon via the umbilical cord. c. The umbilical cord consists of two arteries and one vein. d. The umbilical cord is formed from the yolk sac and the allantois.
- During the formation of mesoderm and its derivative structures and tissues, several of the five essential developmental processes take place. Choose two of these essential processes and describe how and when they occur during the formation and development of mesoderm and its derivatives. Be specific about the cells, tissues, and organs involved and the resultsWhich of the following structures develops into only the fetus? a. Inner cell mass b. Trophoblast c. Blastocyst d. ZygoteWhat part of the blastocyst develops into the embryo?a. Yolk sacb. Placentac. Polar bodyd. Inner cell mass