Q: Which structures develop from the neural tube and somites?
A: the structures that develop from the neural tube and somites are :
Q: Is the mammalianembryonic development director indirect?
A: The process of embryonic development is otherwise known as embryogenesis. Fertilization is the…
Q: Several genetic diseases and syndromes are associated with disturbances of the neural crest.…
A: Introduction: Vertebrates have a temporary group of cells that originated during the embryonic…
Q: What are some other vestigial organs in humans?
A: Evolution is the process of slow and gradual change over a period of time. Many theories are given…
Q: Which embryonic germ layer lines the outer surface of the embryo
A: An embryo is the early stage of human development in which organs form critical body structures.
Q: What is the role of RhoA gene in the development of the Neural crest and neural connectivity?
A: What is the role of RhoA gene in the development of the Neural crest and neural connectivity?…
Q: Differentiate between indirect and direct development.
A: Step 1 Development is a series of changes that occur during the formation of a mature individual…
Q: How do the somites, intermediate mesoderm, and lateral plate mesoderm contribute to embryonic…
A: The early stages in the case of embryonic development start with fertilization. The fertilization…
Q: Enumerate five (5) ways on how to track the routes of the neural crest cells.
A: Neural crest cells (NCC) are multipotent cells that are induced at the neural plate's edge and…
Q: How could you tell if a prepubertal female had an overly active zona reticularis?
A: Adrenal gland cortex is divided into Zona glomerulosa Zona fasciculata Zona reticularis Zona…
Q: What are the molecular mechanisms that can decide which neural crest cells come to express these…
A: Because of its prominence, the neural crest is often referred to as the fourth germ layer, despite…
Q: What is meant by the term “activation” in embryology?
A: Embryology is a branch of biology. It is the study of formation, growth as well as the development…
Q: What are the development phenomenas occurs at the age after 11 years?
A: Humans have extremely long development stages compared to other animals due to the complex nature of…
Q: What is developmental mechanism?
A: In biology, a mechanism is a system of causally interrelated elements and processes that result in…
Q: How does the neural crest originate? What cells or tissues arise from it?
A: The neural crest arise at the time of embryonic development and these cells come by pinching off…
Q: What is the evolutionary significance of parthenogenesis in the class insects?
A: Parthenogenesis is a type of asexual reproduction in which the offspring develops from unfertilized…
Q: What do you mean by vestigial organs? Give some examples.
A: Evolution involves “descent with modifications” which results in the alteration of characteristics…
Q: How are animals classifiedaccording to the germ layerspresent in their embryonicdevelopment?
A: Germ layers are developed during embryogenesis. They are programmed to develop specific organs,…
Q: How is an egg (oocyte) prepared during oogenesis for fertilization? Why is preparation essential to…
A: Oogenesis is defined as the process by which the female sex cells or ova or egg cells are produced.…
Q: In a developing Chicken embryo, what is the fate of the postanal gut?
A: Postanal gut is the the extreme end of the alimentary canal.
Q: What determines the antero-posterior polarity in vertebrate embryos?
A: The Anterior-Posterior (AP) axis is an embryonic axis that helps the animals to travel…
Q: What happens to the corpus luteum if fertilization does not take place?
A: Corpus luteum is a mass of cells formed in the ovary. It is responsible for the production of the…
Q: How might you begin to apply your understanding of cell-to-cell communication toward a more…
A: Introduction The life starts from single cell called Zygote. A zygote is formed by the fusion of…
Q: Which embryologic tissue develops into the spinal cord (mesoderm/ectoderm/endoderm)?
A: The formation of the embryo is one of the defining features of sexual reproduction. This embryo…
Q: Which of the following is used to induce ventral patterning of the neural tube?
A: Neural patterning is a process during which cells in developing nervous system acquires district…
Q: Make a TABLE (containing the summary) of the stages of emrbyonic development with each of the…
A: Embryogenesis is a process of development of the embryo from the zygote , the processes involved…
Q: Poor embryonic development occurs because ____________________________.
A: After fertilization, a single celled diploid zygote is formed, which later develops into…
Q: What is the role of Msx gene family in the development of the Neural crest and neural connectivity?
A: Msx proteins play a key role in craniofacial, limb, and nervous system development. In vitro and in…
Q: Why is there the need for two separate mechanisms to complete the neural tube?
A: Neurulation is the process of the formation of a neural tube. This occurs by transforming the neural…
Q: Explain how cephalization influence the concentration of the sense organs at the front of the body
A: Cephalization is an evolutionary trend in which the nervous system's commands are concentrated in…
Q: Which of the following do the neural crest cells give rise to?
A: Answer: NEURAL CREST CELLS = These are the temporarily cells in groups which are present in…
Q: What is embryological development?
A: Embryo is defined as the early developmental stage of an animal. It is an embryo while it is in the…
Q: At what level of the neural tube do you find the anteriormost somite?
A: Introduction :- The neural tube acts as the embryonic brain and spinal cord . And it forms the Early…
Q: What is the indication of the development of Circulatory System in the 33-hour chick embryo? What is…
A: Organisms develop as a complex individual from a single cell of the zygote. The developmental…
Q: How is the yolk formed in terms of embryogenesis
A: Embryogenesis is the course of improvement of an undeveloped embryo from the zygote. In…
Q: Discuss what will happen if the neural tube fails to close. What are the causes of its failure
A: Answer : The Neural tube will become an infant = spinal cord, brain, and cranium. Neural tube defect…
Q: What is anticipation? explain briefy.
A: Anticipation is the phenomenon where subsequent generations are at the risk of earlier and more…
Q: How do placental mammalsreproduce?
A: All mammals exhibit sexual reproduction. The male and the female gametes are fused to form the…
Q: What is the importance of sensory cephalization in animal survival?
A: Cephalization is the process in animals by which nervous and sensory tissues become concentrated in…
Q: What result would Jost have obtained if female development alsorequired a signal from the gonad?
A: Endocrine system is a regulatory system of ductless glands that secrete chemical messengers called…
Q: What is the first appearance of embryonic callus?
A: Callus is defined as an unorganized tissue mass growing on solid substrate. Callus forms naturally…
Q: How does a simple tube become the complex structures of the brain and spinal cord that generate both…
A: In living organisms, the formation and the development of all the cells and tissues got initiated by…
Q: What are the “traffic signs” in the environment that provide guidance cues for neural crest cells to…
A: The “traffic signs” in the environment that provide guidance cues for neural crest cells to colonize…
Q: How is and egg (oocyte) prepared during oogensis for fertilization? Why is preparation essential to…
A: The process of formation of gametes is known as gametogenesis. In females, oogenesis is a process of…
Q: Label the stages of somatic embryogenesis shown in attachment
A: Fertilization is a phenomenon that causes the production of an embryo by the process of…
Q: Discuss, Why is the neural crest sometimes thought of as the fourth germ layer of the body?
A: Often organisms develop from a single cell called the zygote. In developmental biology, each…
Q: What kinds of advantages does CVS have over amniocentesis?
A: Prenatal testing is used to determine the fetal well-being. Prenatal testing helps in determining…
Q: What tissues and organs arise from the three germ layers in embryonic development?
A: In developmental biology, various stages are involved for the development of a foetus. Gastrulation…
Q: What is indirect development?
A: Development involves the functional and physiological maturation of an individual. It is a…
Q: Can you explain oogenesis and the folllicular developments?
A: Oogenesis is the formation of the ovum in the female members of the mammals. It starts before birth,…
Q: Where does the embryo get oxygen and release carbon dioxide? Hint: Where do vascular systems come…
A: From the given question, the given embryo is assumed to be bird’s embryo.The early stage of the…
Q: How can matter alone construct itself into the organized tissues of the embryo?
A: The embryo is the development stage in multicellular organisms. The development of the embryo begins…
What initiates the directionality of neural tube closure?
Step by step
Solved in 2 steps
- Why is there the need for two separate mechanisms to complete the neural tube?Describe the formation of the neural tube. What are thethree routes taken by neural crest cells?The dorsal hollow nerve cord is which of the following? Question 25 options: a) A hollow tube that develops from ectoderm. Develops into the central nervous system. b) An elongation of the posterior portion of the body. Use for locomotion in fish, or balance in some terrestrial vertebrates. c) A tissue that produces thyroid type hormones. d) A flexible, rod-shaped structure that grows from mesoderm. Gives support to an animal in embryonic development of chordates or for entire life depending on the species. e) An opening in the pharynx. In aquatic chordates they allow for exit of water that enters the mouth.
- Make a TABLE (containing the summary) of the stages of emrbyonic development with each of the following: 1. Neural tube 2. Primary and secondary vesicles 3. VentriclesWhat is formed from neural crest cells?What is the cell divisionduring the first stage of theembryonic developmentcalled? How is this stagecharacterized?