Chapter 1. The science of Biology Outline: 1. Properties of life 2. Science a. Scientific Reasoning/method b. Experimental controls 3. Intro to Evolution a. Charles Darwin b. Malthus c. Natural selection d. Examples of evolution 4. Evidence for evolution Terms: Biology: Scientific study of living organisms and how they evolved. Science: Knowledge derived from observation and experimentation carried out to determine
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Chapter 11: Cell Communication Cell-to-cell communication is essential in multicellular organisms. They must communicate to coordinate activities such as growth and development‚ and reproduction. In addition unicellular organisms communicate with each other. Signals may use light‚ or touch but we will focus on chemical signals. 1. External signals are converted to responses within the cell a. Evolution of cell signaling i. In yeast a cells and αcells both secrete chemicals
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The Role of ATP in cellular metabolism Cells are required to carry out thousands and thousands of chemical reactions just so everything will remain functioning properly. Every reaction carried out requires energy from a particular source. Cells have come up with their own way of doing this in very well-organized metabolic systems. Each cell type has its own variation of the precise mechanisms. Animals receive energy through aerobic respiration‚ where as plants deliver energy through the act of
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removing heat and delivering nutrients and water. Therefore‚ blood flow is important in cellular respiration‚ which is the process where ATP is produced through the conversion of metabolites‚ also involving the consumption of oxygen and release of CO2 as a waste product. ATP is vital to skeletal muscle contraction‚ since the power stroke is facilitated by ATP binding to and being hydrolyzed by myosin‚ which pulls the actin filament inward. Since muscle cells respire and contract more during exercise
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that will affect photosynthesis‚ along with availability of CO2 3. If photosynthesis ceased there would be little food or organic matter on Earth. Most organisms would disappear‚ and in time Earth’s atmosphere would become nearly devoid of oxygen. b. ATP is formed by the addition of a phosphate group to a molecule of adenosine diphosphate (ADP). Courtney S. 4th Period
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Josh P. AP Biology 12-10-13 Lab Writeup The Effect of Transformation of pGLO in Bacteria Background/Objectives/Hypothesis: Genetic transformation is a process that primarily is inserting new DNA into an organism to change that organism’s trait. This process has many useful benefits when used correctly in different organisms. In this lab‚ bacteria was transformed by inserting DNA for Green Fluorescent Proteins. The DNA for these proteins were taken from bioluminescent jellyfish Aequorea
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JJ Guo 12/4/12 AP Bio Chapter 9 and 10 Review Questions 1. Binary fission is the subdivision of a cell. The relative speed is faster. Chromatin is spaghetti like before mitosis Chromosomes (X-Shape) Chromatid (each individual part of the chromosome) Centromere (middle part of the chromosome) Centriole (involved in cellular division‚ the poles that pull the chromatids) Centrosome (microtubule organization center) 4. Diploid (2n) number Half the diploid is haploid (n) number Humans have
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References: Reece‚ Jane. Campbell‚ Neil. Biology Seventh Edition. San Francisco: Pearson‚ 2005 http://www.biologycorner.com/bio1/diffusion.html# http://hyperphysics.phyastr.gsu.edu/hbase/Kinetic/diffus.htm l
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Biology 20 IB Design Lab Does increasing or decreasing the ph level of a 3% concentration H2O2 (l) solution affect the amount of oxygen released between 15.0ml of the solution and a 5g sample of liver? The reaction is measured by the difference in mass of a balloon that is used to capture the amount of gas released by the catalase enzyme found in liver reacting with a basified 3% H2O2 (l) and an acidified 3% H2O2 (l) . Chemical reactions occur when two or more molecules interact and the molecules
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‘compare’ the items (i.e. how the items are similar) and 50% of the score will focus on how well you ‘contrast’ the items (i.e. how the items are different). Each ‘short essay’ question is to be answered by at least 3-5 sentences. Each ‘essay’ question is to be answered by at least 2-3 paragraphs of 3-5 sentences
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