2.7.- COMPARACION ENTRE LAS CELULAS Recuerda que las celulas procarionticas son celulas primitovas que no tienen organelos rodeados por membranas. Su material nuclear se encuentra flotando en el citoplasma. Las bacterias se clasifican como procariontas. Las celulas eucariontas son las mas avanzadas y contienen organelos rodeados por membranas. Su material nuclear esta rodeado por una membrane nuclear. Las celulas de las plantas‚ los hongos y los animals son eucarionticas. Las celulas de las plantas
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uses the presence of 4 morphologic criteria to assign a grade: 1. nuclear atypia 2. mitosis 3. endothelial proliferation-’piled-up’ endothelial cells. NOT hypervascularity 4. necrosis The grade then depends on accumulation of these criteria as follows: * grade 1 - 0 criteria * grade 2 - 1 criterion (usually nuclear atypia) * grade 3 - 2 criteria (usually nuclear atypia and mitosis) * grade 4 - 3 or 4 criteria source: http://radiopaedia.org/articles/st-anne-mayo-astrocytoma-grading-system
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* Charles Darwin Origin of species by natural selection Theory of natural selection 1. Over production More offspring are produced than can survive 2. Variation There are differences in the traits of these organisms 3. Competition 4. Best adapted survive select agent 5. Reproduce Pass on desirable traits to the next generation Organisms rarely have mutations that can allow the to better adapt to there envirironment. I. Evidence for evolution A. Fossils Remnants of organisms that
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PHY 121 Syllabus Course Description Introduction to general physics for programs requiring a one-year‚ non-calculus based physics course. Includes mechanics and heat. IN is the integrated version of the course with the lecture and lab taught simultaneously. Performance Objectives Upon completion of the course‚ you will be able to: Use the meter-kilogram-second-ampere (MKSA) metric system of measurement in lab and in problem solving. Use specific mathematics skills (powers of 10
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the cell cycle. The Second is to understand what’s going on in the visuals by creating commentary to describe the changes from stage to stage. The third is to repeat the first and second by critiquing other videos. We used our understanding of mitosis that we were taught in class to create these animations. The easiest part of this project would be creating the models. This is can be done from memory easily. The hardest part of this project would be uploading my animation. The process was missing
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the Pterophyte sporangia‚ called sori. As in mosses‚ meiosis occurs in the sporangia‚ which then release spores‚ continuing the cycle. <br> <br>Mitosis in Bryophytes begins germination‚ or growth. It directly follows meiosis. As mitotic division continues‚ protonemata (1N) are formed. They grow until they are mature gametophytes. In Pterophytes‚ mitosis occurs directly after fertilization. The zygote divides and grows until it peeks out of the parent gametophyte‚ then it matures until it can release
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Diploid cells contain two complete sets (2n) of chromosomes. Diploid cells reproduce by mitosis making daughter cells that are exact replicas. Some examples are skin‚ blood‚ muscle cells (also known as somatic cells). 2. In 2-4 sentences compare and contrast mitosis and meiosis including the steps‚ purpose and products. Mitosis and meiosis are types of nuclear division that make different types of cells. Mitosis makes diploid cells that are genetically identical. It takes place throughout an organism’s
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References: 1. Labpaq-General College Chemistry-50-0123-ck-01 Lab Manual- Published by Hands-On Labs Inc. 3880 S. Windermere St. Englewood‚ CO 80110 2. Chemistry & Chemical Reactivity‚ the 8th edition by Kotz‚ TreIchel‚ Townsend‚ Publisher Thomson‚ Brooks/cools 2012
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pair up in the ascogenous but donot fusend this is called DIKARYOTISATION. From‚ the female organ the ascogenous hyphae are produced. These ascogenous hyphae now contains the nuclei which are in poairs. The uclei pairs undergo conjugate division or mitosis and septan develop to cut the ascogenous hyphae into cells. The tip of the ascogenous hyphae elongate and bends into a hookmn which is called a CROZIER. The two nuclei at the tip in the crozier divide conjugately 9mitosis) as a result of which four
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Leanne Butler 02-12-09 Anatomy and Physiology Introduction to the Human body Introduction The human body is such an interesting machine‚ the way it is structured and how it works is educational. There is so much to learn about the human body and up until today scientists are still under going medical research. There are a lot of questions people would like to know about how their body works. The report will include
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