cellular division are mitosis and meiosis. The normal process of cellular division is mitosis where two daughter nuclei are produced and have equivalent genetics to the parent nucleus. However‚ meiosis is the variation of cellular division where gametes are produced and each daughter cell yields half the DNA from the parent cell. Also‚ before mitosis and meiosis can occur chromosomes must replicate in order to produce identical chromatids and they are each connected to a centromere. As pointed out
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Learning Pack for Biological Diversity – Unit 1 (Science in Action 9) Copyright 2005 – Developed by Edquest Resources (www.edquest.ca) 1 Learning Pack for Biological Diversity – Unit 1 (Science in Action 9) 2 ‘Focus in Action’ UNIT LEARNING PACKS These booklets are designed to provide Grade 9 students with all the resources needed to review or reinforce concepts‚ covered in the Alberta Science Curriculum‚ and included in the Grade 9 Science Final Exam in June. There are circumstances
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ACCESS TO HIGHER EDUCATION HUMAN BIOLOGY Explaining the role of mitosis & meiosis IN GROWTH AND REPRODUCTION Table of Content Page Number Cell division 1 Why do we need cell division? 1 Chromosomes 1 What is a chromosome? 1 The Cell Cycle 2 Process of Mitosis 3 What is Mitosis? 3 Stages of Mitosis 3 Interphase 3 Prophase 4 Prometaphase 5 Metaphase
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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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Mark scheme June 2002 GCE Biology B Unit BYB4 Copyright © 2002 AQA and its licensors. All rights reserved. The Assessment and Qualifications Alliance (AQA) is a company limited by guarantee registered in England and Wales 3644723 and a registered charity number 1073334 Registered address: Addleshaw Booth & Co.‚ Sovereign House‚ PO Box 8‚ Sovereign Street‚ Leeds LS1 1HQ Kathleen Tattersall: Director General klm SECTION A Question 1 (a) GCE: Biology B – BYB4 June 2002 X = grana/lamellae/thylakoid
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Maintaining a Balance Enzymes 1.1 Identify the role of enzymes in metabolism‚ describe their chemical composition and use a simple model to describe their specificity on substrates Enzymes are biological catalysts‚ meaning they are organic and speed up a chemical reaction without taking part in it. This means it has a vital role in metabolism where it ensures that the chemical reactions that make up metabolism can function fast enough to sustain life by lowering activation energy. Metabolism
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1 – Mitosis and Meiosis 1. A certain species has three pairs of chromosomes: an acrocentric pair‚ a metacentric pair‚ and a telocentric pair. Draw a cell of this species as it would appear in metaphase of mitosis. (BAP 2.18) 2. A cell in G1 of interphase has 12 chromosomes. How many chromosomes and DNA molecules will be found per cell when this original cell progresses to the following stages? (BAP 2.20) a) G2 of interphase b) Metaphase I of meiosis c) Prophase of mitosis d) Anaphase I of meiosis
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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 its own spores. <br> <br>Mosses exhibit the embryophyte condition‚ which means their gametes develop with protective sheaths of cells. This was an adaptation that allowed plants to become hardier. Mosses have two sexes of gametangia; the male gametangium is called an antheridium‚ and the female is called an archegonium. Eggs are produced
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Unit 5 Task 9 – The reproductive system Female – In the human reproductive process‚ two kinds of sex cells are involved. The male gamete‚ or sperm‚ and the female gamete‚ the egg or ovum‚ meet in the female’s reproductive system. http://www.nhs.uk/news/2010/01January/PublishingImages/P632053-Coloured_SEM_of_egg_cell_in_secondary_follicle-SPL.jpgWhen the sperm fertilizes‚ or meets‚ the egg‚ this fertilized egg is called the zygote. The zygote goes through a process of becoming an embryo and
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Bio SOL * Safety * Rules in Lab- wear goggles‚ no food‚ drinks‚ gum‚ and candy in lab‚ no open-toed shoes‚ no chemicals or equipment can be removed from lab‚ teacher is absolute authority‚ contact lenses aren’t recommended‚ never hear a liquid in a closed container‚ stay out of prep room * Safety Equipment- shower and sinks * Scientific Investigation * Scientific Method * Observing a problem: variable-something that can change or vary‚ independent variable-
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