In animals, Hox genes activate proteins to determine A. animal cephalic region O B. animal physiology O C. animal body plan O D. animal caudal region O E. animal reproduction
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A: It is any of several extinct elephantine mammals that appeared in early Micocene.
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- Macular degeneration is a serious disease of the eyes that can lead to blindness. A recent study suggeststhat nutrients such as lutein and zeaxanthin, found in green leafy vegetables, can slow the onset andprogress of this disease in humans. In the study, a group of 2000 older individuals were contacted throughrandom digit dialing and asked about their eating habits. (Macular degeneration usually manifests later inlife.) The group who ate green leafy vegetables fewer than two times a week had a significantly higher rateof macular degeneration (25% higher) than those who ate green leafy vegetables five or more times perweek. They also had a higher rate (5%) of cases that were considered severe among those who had thedisease.(a) Determine whether the study is an observational study or an experiment. Explain how you know.(b) If the study is an experiment, identify the control and treatment groups. If the study is observational,state whether it is a case-control study, and if so, identify…Group and Mutation Time Taken to Collect Candy Time Taken to Eat Candy A Extra long nails 1 minute 3 seconds 8 minutes 12 seconds B No digits; hands paddle-like 15 seconds 7 minutes 18 seconds C Normal 22 seconds 2 minutess 44 seconds D Hands fused in frontof body; no range of motion Did not collect 15 pieces.Collected 11 pieces Ate 11 pieces;4 minutes 12 seconds E Webbing on hands and feet 11 minutes 45 seconds 17 minutes 12 seconds F No peripheral 3 minutes 2 seconds 2 minutes 52 seconds G Blind Did not collect 15 pieces.Collected 4 pieces in 4 minutes Ate only 4 pieces;1 minute 16 seconds H Short legs; normal numberof digits on hands and feet 55 seconds 3 minutes 2 seconds Natural selection involves changes in the genetic makeup of a population over a period of time. The random change of DNA from parent to offspring, called mutations, can help produce variations in offspring. Some mutations can be helpful, while others can be harmful. In this experiment,…Which of the following is NOT true about the specification of the eye field? (Check all that apply) A ET induces RX, which in turn induces Otx2 and Pax6. B During late gastrulation, the forebrain and hindbrain are specified. Pax6 initiates the expression of a network of transcription factors, some of which mutually activate one another. D ET induces RX, which in turn induces Pax6 and blocks Otx2 within the eye field. ET induces RX, which in turn blocks Otx2 and Pax6. F During early gastrulation, Noggin promotes the expression of both ET and Otx2. During late gastrulation, Otx2 blocks the inhibition of ET by Noggin. H) It starts with neural induction when the neural plate is induced within the ectoderm. Pax6 is only required for the specification of the retina. During early gastrulation, Noggin indices Otx2 but blocks ET. E Feedback That's not correct
- e.html?courseld=17594778&OpenVellum HMAC-977f3bf795c701a4bc0d750e73753852#10001 hesi book PubMed Google Scholar Citation Machine®:... S StuDocu - Free sum.... omework Activity: Figure 7.31 (1 of 2) Coccyx llium Pubis Sacrum Sacroiliac joint Hip bone (coxal bone) Pubic symphysis Ischium R 2019 Pearson Education in 5 Copyright © 2022 Pearson Education Inc. All rights reserved. | Terms of Use | Privacy Policy | Permissions | Contact Us | 6 & 7 P Pearson U 8 9 O ) 0 QL study room booking P PCategorize each statement as an example of adhesion, communication, or differentiation. Statement During animal development, proliferating cells become organized into sheets of cells called epithelia. Cadherins play and essential role in maintaining the integrity of these sheets in a process known as: Complex multicellular organisms rely on signaling molecules synthesized by one cell to bind to receptors on the surface of a second cell to regulate gene expression. This type of interaction between two different cells is a form of: The human body contains 200 distinct cell types, yet each cell contains the same genome. The process by which each cell adopts a specific fate is known as: differentiation Answer Bank adhesion communication CategoryWhat is Sonic hedgehog, and why it is important? Sonic hedgehog is a protein in humans that is encoded bybthe SHH gene. It plays a key role in the development of animals as distantly related as insects and mammals.
- Which of the following does a fate map of an embryo show?A. differences in developmental potential between cellsB. to what tissues cells will contribute later in developmentC. where key signaling centers are locatedD. differences in developmental competence between cellsWRT is a gene in C. elegans worms which is normally expressed in a specific stage of development. Worms without this gene (wrt-/wrt- genotype) survive, but grow too large, never develop some parts of their anatomy. Over-expression of WRT results in a different phenotype: the worms have stunted growth, developing mature anatomical structures too early in their growth. The following experiments were used to learn how WRT is regulated. a. Several genetic loci that are also involved in development in the worm are suspected of being regulators of WRT. Mating experiments shows that some of these genes have epistatic relationships with WRT, and others don't. Which are likely to be WRT regulators? i. Genes epistatic to WRT are unlikely to regulate WRT ii. Genes epistatic to WRT are likely to regulate WRT iii. Epistasis cannot tell us whether another gene is in the same pathway as WRT b. Deletion of locus 1 in a WRT wildtype background causes the wrt- associated phenotype (large but…Exposing C. elegans to an RNAi molecule homologous to a non-protein-coding RNA gene resulted in the worms’ inability to respond to touch. What predictions could you make about the function of that gene in development?
- Define adaptation and selection pressure. Why are theseconcepts important in understanding human anatomy andphysiology?Define what Negative Feedback is in terms of developmental biology. And then provide an example that shows how negative feedback is relevant to developmental biology. (signal transduction and somitogenesis should be included in definition or example) Please make the description/example very detailed.Asap
