Researchers investigated the step-by-step processes of cell differentiation in somites throughexperiments in which cells were transplanted from one location to another early after somiteformation. What did these experiments show?The cells of a somite are determined as the somite matures in response to cell-to-cell signals.The cells of a somite are irreversibly determined as soon as the somite is formed, based on cell-to-cell signals.The cells of a somite are determined as the somite matures in response to internal cytoplasmic signals.The cells of a somite are irreversibly determined as soon as the somite is formed, based on internalcytoplasmic

Cellular differentiation is a process during development in vertebrates, during which an…

Researchers investigated the step-by-step processes of cell differentiation in somites through experiments in which cells were transplanted from one location to another early after somite formation. What did these experiments show? O The cells of a somite are determined as the somite matures in response to cell-to-cell signals. O The cells of a somite are irreversibly determined as soon as the somite is formed, based on cell-to-cell signals. The cells of a somite are determined as the somite matures in response to internal cytoplasmic signals. The cells of a somite are irreversibly determined as soon as the somite is formed, based on internal cytoplasmic

Researchers investigated the step-by-step processes of cell differentiation in somites through experiments in which cells were transplanted from one location to another early after somite formation. What did these experiments show? O The cells of a somite are determined as the somite matures in response to cell-to-cell signals. O The cells of a somite are irreversibly determined as soon as the somite is formed, based on cell-to-cell signals. The cells of a somite are determined as the somite matures in response to internal cytoplasmic signals. The cells of a somite are irreversibly determined as soon as the somite is formed, based on internal cytoplasmic

Biology (MindTap Course List)

11th Edition

ISBN:9781337392938

Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Publisher:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Chapter33: Plant Structure, Growth, And Development

Section: Chapter Questions

Problem 10TYU: Cell differentiation occurs through _______________, whereas morphogenesis involves _______________....

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A classical experiment studying the fate determination of stem cells in the developing embryo uses the transplantation of somites from one organism to another. In such an experiment, a scientist transplanted somites 20, 21, and 22 from the right side of the neural tube from five-day-old developing quail embryos into chick embryos. The transplantation was performed in two orientations so that the order of the somites was sometimes reversed. Use the passage to answer the question. Suppose that somite stem cells commit to their cell fates by three days post fertilization. Which result would be MOST likely in the chick embryos receiving somites transplanted in the reverse order? A. The organs arising from quail somites develop in a normal order because local signaling molecules appropriately pattern the developing organs. B. The organs arising from quail somites develop in a normal order because transcriptional programs activated in the nucleus cannot be reversed.…
A classical experiment studying the fate determination of stem cells in the developing embryo uses the transplantation of somites from one organism to another. In such an experiment, a scientist transplanted somites 20, 21, and 22 from the right side of the neural tube from five-day-old developing quail embryos into chick embryos. The transplantation was performed in two orientations so that the order of the somites was sometimes reversed. Use the passage to answer the question. Observations of the developing chick embryo reveal that skeletal muscles develop from the transplanted somites even though motor neurons innervating those muscles arise from chick neural crest cells. Based on these observations, what is MOST likely true? A. Neural crest cells differentiate into somites. B. Neural crest cells fuse with developing somite cells. C. Neural crest cells develop from migrating somite cells. D. Neural crest cells send projections into developing…
A classical experiment studying the fate determination of stem cells in the developing embryo uses the transplantation of somites from one organism to another. In such an experiment, a scientist transplanted somites 20, 21, and 22 from the right side of the neural tube from five-day-old developing quail embryos into chick embryos. The transplantation was performed in two orientations so that the order of the somites was sometimes reversed. Use the passage to answer the question. Central self-tolerance in the immune system arises when maturing T cells in the thymus undergo apoptosis when they bind to self-antigens. Based on this information, what would MOST likely occur as the chick immune system develops? A. T cells would recognize transplanted quail somites as foreign and rapidly divide. B. T cells would recognize transplanted quail somites as foreign and undergo apoptosis. C. T cells would recognize transplanted quail somites as self and rapidly divide.…
Explain the reason why in the absence of Delta, cells become unsynchronized and somites are not formed completely.
Why is it easier to manipulate embryonic stem cells to differentiate into various tissues than it is to manipulate a typical adult cell? a. As cells develop, signaling pathways can cause some genes to be turned off during development. b. Adult cells have different DNA content than do embryonic stem cells. c. Emybronic stem cells pose less of a threat for organ rejection as do an individual s own adult cells. d. It is no easier to manipulate emybronic stem cells to differentiate into various tissues than it is to manipulate a typical adult cell.
Which of the following best describes the concept of cell differentiation during the development of a multicellular organism? A. During development, all of the genes in the embryo's cells are expressed at first, but fewer and fewer are expressed as time proceeds. B. During development, different sets of genes are deleted from different cell types so that at the end of development, each cell has only the genes it needs. C. During development, different cells become specialized to have different phenotypes even though they all originated from the same cell. ..
Why is cell differentiation important to polar bears?
What specific molecular factors determine the differentiation of embryonic stem cells into different cell types during development?
In other words, the master regulator initiates a program of gene expression that narrow the potential fates of the precursor's cells’ descendants to the type of cells that participate in the organ’s function. Question: Once a master regulator gene is turned on in some cells and not in others, how do cells “remember” that pattern through all the cell division that occur to form a specific organ?
One day while walking across campus, you see a female butterfly laying fertilized eggs, as shown in the image below: 1. When the female butterfly’s eggs are fertilized, the fusion (2N) nucleus will divide repeatedly giving rise to cleavage nuclei, which: a. can become trophocytes that migrate into the germarium and connect to the developing embryo by nutritive cords. b. can migrate to the periplasm and become cleavage cells that ultimately give rise to the germ band and the serosa. c. can migrate to the peripheral cytoplasm and become germ cells, which eventually move into the forming gonads and become oogonia or spermatogonia. d. can remain in the yolk and become vitellophages that digest the yolk and make nutrients available to the forming embryo. e. only b and c f. only a and d g. all except a h. all except d 2. In the mature, unfertilized egg of the adult female butterfly: a. bicoid mRNAs will congregate at the end of the…
In normally dividing cells, once chromosomes have been properly segregated via the steps of mitosis, the two resulting “daughter cells” separate. In animal cells (and other cell types without a cell wall) the contractile ring plays a crucial role in the process of cytokinesis. Exactly how the contractile ring is accurately positioned, so as to be located midway between the two poles (ends) of the dividing cell, is still not fully understood, although factors released from the mitotic spindle are thought to play a role.Regardless of the precise positioning mechanism, one key player in the assembly of the contractile ring is the GTP/GDP binding protein Rho. In its active form, Rho can stimulate the activity of the actin-binding protein formin and (via effects on the myosin regulatory light chain) that of myosin II. Given their respective roles, why might activation of formin and myosin II be beneficial as cells assemble a functional contractile ring structure?
If you determined the Muv-causing mutation functioned in the primary cell lineages, how could you determine if the gene works in upstream or downstream of let-60 in the differentiation pathway. Tell me specifically what read out (phenotype) you’re using to determine the order, that is, what are the experiments and what specifically what are you observing/counting?