Life Science Lab. A. Arnold Tuesdays @ 2:30 September 30th‚ 2011 Lab Report: Nuclear and Cell Division. PART A: Stages of Mitosis in my own words. 1. Interphase: DNA has formed already‚ but it remains in the simple form of chromatin. Chromatins are structures that are loosely coiled in the cell.3 I also observed during my lab that this was the only stage where I could still see a nucleus and nucleolus intact within the cell; this is because it’s the only stage where the nuclear membrane has
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* NCERT 1. Reproduction in Organisms INTRODUCTION Biology in essence is the story of life on earth. While individual organisms die without fail‚ species continue to live through millions of years unless threatened by natural or anthropogenic extinction. Reproduction becomes a vital process without which species cannot survive for long. Each individual leaves its progeny by asexual or sexual means. Sexual mode of reproduction enables creation of new variants‚ so that survival advantage is enhanced
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A planarian is free-living flatworm that lives in fresh water. Planarians are organisms that live in freshwater. Planarians are part of the metazoan phylum. Animals in the metazoan like jellyfish have the ability to regenerate (Raymond 511-512). Planarians are closely related to animals like jellyfish and starfish. These animals shared the same special ability to regenerate; starfish are able to regenerate their arm when it is cut off. Jellyfish are able to regenerate their stinger when cut off (Li
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Structure and function of macromolecules within a living organism ‘Some biological molecules in organisms are small and simple containing only one or a few functional groups‚ others are large‚ complex assemblies called macromolecules’ [1]. The term macromolecule is convenient because the bulk properties of a macromolecule differ from those of smaller molecules. These large chemical compounds have a high molecular weight consisting of a number of structural units linked together by covalent
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Wheat 10 Rice 9 Baker’s Yeast (Fungus) 11 Candida Yeast (Fungus) 13 Neurospora (Fungus) 14 When scientist say that all living organisms share a universal genetic code it means DNA is called the universal genetic code because the structure and components of DNA are that all living organisms are related in some type of way. The universal genetic code relates to the hypotheses of life on earth by showing life originated from a single ancestor‚ the genetic
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Meiosis is a type of cell division that is used for sexual reproduction. It creates the egg and the sperm cells. Meiosis begins with a parent cell (diploid)‚ which contains two copies of each chromosome. The cell then goes through DNA copying and two cycles of cell division‚ also known as Meiosis I and Meiosis II. When the cell goes through this cycle‚ it creates four haploid‚ which means they contain half of the number of chromosomes of the parent cell. Meiosis I begins with Prophase I. In Prophase
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Practical 1: Observation of mitosis in garlic root tips Introduction The practical will involve the preparation‚ observation‚ and classification‚ of the various stages of mitosis by observing garlic root tips using a microscope. The study comes under the heading of cytogenetics which is the visual characterisation of genetic material and the study of how that material reacts during the life of the cell. Strictly speaking‚ mitosis is the division of the nucleus into two daughter nuclei that are
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perception and test. 1.1 Explain the need of living organisms for nutrition. Nourishment is the science that deciphers the connection of supplements and different substances in sustenance (e.g. phytonutrients‚ anthocyanins‚ tannins‚ and so forth.) in connection to support‚ development‚ propagation‚ wellbeing and malady of a creature. It incorporates nourishment consumption‚ ingestion‚ osmosis‚ biosynthesis‚ catabolism and discharge. The diet of an organism is what it eats‚ which is largely determined
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Living in the U.S today with a political election coming up I believe it is important to be involved in the voting process. As young adults‚ we as juniors and seniors almost of age to vote really should in my opinion should be paying attention to the election more than they ever have. The reason for that is due to the fact that the U.S has one of the lowest voter turnout of any country in the world while the U.S in 2012 56% of voters turned out while some countries will get up to 95% voter turnout
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copy their genetic material. Mitosis is the first stage of cell division‚ in which the copied chromosomes are separated into two new nuclei. Then in cytokinesis the cell divides into two daughter cells. If no mutations or errors occur‚ the genetic material in each daughter cell is identical to what was in the original cell. Now that you have completed this lesson‚ you should be able to: describe the stages of the cell cycle explain the process of mitosis and its role in the formation
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