this pair is called the sex chromosomes. The other 22 pairs carry all the other genes that automatically determine everything else about you‚ thus‚ they are called autosomes. In forming the gametes (egg or sperm)‚ one of each chromosome pair will be given by each parent‚ so these cells‚ or gametes‚ have only 23 single chromosomes (haploid or n). In this way‚ you contribute half of the genetic information (genotype) for the child; your partner will contribute the other half. Because
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Write your name here Surname Other names Centre Number Candidate Number Edexcel GCSE Biology/Science Unit B1: Influences on Life Higher Tier Thursday 1 March 2012 – Morning Time: 1 hour You must have: Calculator‚ ruler Paper Reference 5BI1H/01 Total Marks Instructions se b ink or • Uill inlack boxesball-point pen. page with your name‚ F the a the top of this • centre number andt candidate number. nswer all uestions. • Answer theqquestions in the spaces
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AQA Exam-style Questions Cell activity 1. a) - A : nucleus - B : mitochondria - C : ribosomes - D : plasmids b) The nucleus controls all activities within the cell. It also contains genetic materials used to create new cells. c) Plasmids and genetic materials in cytoplasm d) i 75 ii 28 iii 0.15 e) Protein can be used to build up cells as it is a structural component of every cells. It is also an enzyme as well. f) There are no mitochondria in bacterial cells because they are
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Water (H₂O) is a liquid at room temperature‚ and its unusual properties provide the basis of many biological processes and organisms. In humans water is the vital product of respiration (C₆H₁₂O₆ + 6O₂ = 6CO₂ + 6H₂O.) The importance of water being produced as a product of respiration is that water is a main component of the human body (a human body consists of 65% water)‚ and plays a key role in many biological processes that occur. Water in the body had a large effect on the movement of substances
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The Cell Cycle A eukaryotic cell cannot divide into two‚ the two into four‚ etc. unless two processes alternate: doubling of its genome (DNA) in S phase (synthesis phase) of the cell cycle; halving of that genome during mitosis (M phase). The period between M and S is called G1; that between S and M is G2. So‚ the cell cycle consists of: G1 = growth and preparation of the chromosomes for replication; S = synthesis of DNA [see DNA Replication] and duplication of the centrosome; G2
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HSC BIOLOGY TOPIC 2: BLUEPRINT OF LIFE HSC BIOLOGY TOPIC 2: BLUEPRINT OF LIFE 1) Evidence of evolution suggests that the mechanisms of inheritance‚ accompanied by selection‚ allow change over many generations. 1.1.1 Outline the impact of evolution of plants and animals of: * Changes in physical conditions in the environment * Changes in chemical conditions in the environment * Competition for resources
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| The active ingredients in gastric juice are Answer | | Selected Answer: | pepsin and hydrochloric acid | | Question 2 1 out of 1 points | | | The adjective hepatic refers to the Answer | | | | | Selected Answer: | liver | | | | | Question 3 1 out of 1 points | | | Select the term from the second column that best applies to each item in the first column and write the appropriate letter in the blank. Answer | | | | | Question | Selected
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Biology – living organisms Scientific Method – making observations‚ proposing ideas about how something works‚ testing ideas‚ discarding or modifying -allows us to solve problems and answer questions efficiently and effectively. -Ideas about “how things work” = hypothesis. -proposed explanation for one or more observations -scientific hypothesis MUST be testable -must be falsifiable (observations could prove false) Observations Question Hypothesis = imagination‚ intuition‚ chance
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Genetics Practice Test Multiple Choice Identify the choice that best completes the statement or answers the question. ____ 1. Pea plants were particularly well suited for use in Mendel’s breeding experiments for all of the following reasons except that a.|peas show easily observed variations in a number of characters‚ such as pea shape and flower color.| b.|it is possible to control matings between different pea plants.| c.|it is possible to obtain large numbers of progeny from any given
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otherwise requires‚— 10 Short title‚ extent and commencement. (a) "assisted reproductive technology" means techniques that attempt to obtain a pregnancy by handling or manipulating the sperm or the oocyte outside the human body‚ and transferring the gamete or the embryo into the reproductive tract; Definitions. 2 (b) "assisted reproductive technology clinic" means any premises used for procedures related to assisted reproductive technology; (c) "child" means a child born through the use of assisted
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