Which of the following is an example of autonomous specification? O Multiple Drosophila nuclei division without cellularization of blastomeres Destroying one half of a 2 cell stage Xenopus embryo and subsequent loss of half the embryological structures O Differentiation concentration of paracrine factors within the embryo cytoplasm Separation of sea urchin blastomeres resulting in individual pluteus larva development

Which of the following is an example of autonomous specification? O Multiple Drosophila nuclei division without cellularization of blastomeres Destroying one half of a 2 cell stage Xenopus embryo and subsequent loss of half the embryological structures O Differentiation concentration of paracrine factors within the embryo cytoplasm Separation of sea urchin blastomeres resulting in individual pluteus larva development

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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Which of the following is an example of conditional specification? Multiple Drosophila nuclei division without cellularization of blastomeres Destroying one half of a 2 cell stage Xenopus embryo and subsequent loss of half the embryological structures Separation of sea urchin blastomeres resulting in individual pluteus larva development Differentiation concentration of paracrine factors within the embryo cytoplasm
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Which of the following is an abnormality that can delay the metaphase-to-anaphase transitions?Attachments of both kinetochores to microtubules from the same spindle poleA failure of one kinetochore to attach to spindle microtubulesA mutation that inhibits the activity of the APCA lack of tension at the kinetochore
A researcher performs a tissue transplant experiment with an early Drosophila embryo. The researcher observes that transplanting tissue from the area of the embryo that normally becomes the head of the fly to the bottom part of an embryo does not alter the embryological development of that organism. What to conclude from that observation? This observation remains to be explained. The embryo does not produce sufficient survival factors to maintain the transplanted cells. The cell fate of the transplanted cells had not yet been determined. O The transplanted cells all activate the apoptosis response, and thus do not affect the developmental program.
Cell differentiation occurs through _______________, whereas morphogenesis involves _______________. (a) pattern formation; cell determination (b) cell division; cell expansion (c) cell expansion; pattern formation (d) cell determination; cell division (e) cell determination; pattern formation
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Select all the events that occur during anaphase I
What process controls cell numbers during development? O Necrosis O Necroptosis O Apoptosis O Ferroptosis None of the above
Explain the wingless and hedgehog feedback mechanism that is used to pattern the fly embryo.
Which of the following statement is NOT true? Cell cycle cyclin dependent kinases (CDKs) are synthesized and degraded in every cell cycle O Activity of the S phase CDKs rise in the S phase and drops in the G2 and mitotic phase APC/C proteasome activity increases during mitotic phase and drops towards the end of the G1 phase G1/S cyclin protein amount rises in the G1 phase
Select ALL of the following that occur during spermiogenesis: Microtubules form a flagellum The nucleus condenses O Proteolytic (digestive) enzymes are bundled in an acrosomal cap Excess cytoplasm is shed
Notice that the size of the scale bar is 50 um. Keeping this image available, watch the șsea 4. Finding the size of a sea urchin embryo Observe the image of the sea urchin embryo. 50μm Photo credit. urchin embryo cell division movie Calculate the diameter of a sea urchin embryo at he one-, two-, and four-cell stages, Show your calculations below. If that video doesn't play (it unfortunately requires Flash), you can try this similar but longer one that involves a longer story of sea urchin romance preceding fertilization and zygote divisions! It lacks a scale bar, but you can use the scale bar from the image above. https://www.youtube.com/watch?v3D4445zftlCDQ a. One cell-your calculations: b. Two cells-your calculations: c. Four cells-your calculations: