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Reproduction

Solubility rules

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Solubility Rules 1. All common salts of the Group 1 elements and ammonium ion are soluble. 2. All common acetates and nitrates are soluble. 3. All binary compounds of Group 17 elements (other than F) with metals are soluble except those of silver, mercury(I), and lead. 4. All sulfates are soluble except those of barium, strontium, lead, calcium, silver and mercury(I). 5. Except for those in Rule 1, carbonates, oxides, sulfides, and phosphates are insoluble. 6. Oxides and peroxides are always written in molecular form. 7. Gases are always written in molecular form. 8. The only strong bases are the hydroxides of Group I & II metals except beryllium. 9. The only strong binary acids are those of chlorine, bromine, and iodine.

AP Bio_genetic_variation

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Genetic variation produced in sexual life cycles contributes to evolution * Mutations (changes in an organism?s DNA) are the original source of genetic diversity * Mutations create different versions of genes called alleles * Reshuffling of alleles during sexual reproduction produces genetic variation Origins of Genetic Variation Among Offspring * The behavior of chromosomes during meiosis and fertilization is responsible for most of the variation that arises in each generation * Three mechanisms contribute to genetic variation: ? Independent assortment of chromosomes ? Crossing over ? Random fertilization Independent Assortment of Chromosomes * Homologous pairs of chromosomes orient randomly at metaphase I of meiosis

AP Bio_Cell division

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Meiosis and Sexual Life Cycles Variations on a Theme * Offspring resemble their parents more than they do unrelated individuals * Heredity is the transmission of traits from one generation to the next * Variation is demonstrated by the differences in appearance that offspring show from parents and siblings * Genetics is the scientific study of heredity and variation Concept 13.1: Offspring acquire genes from parents by inheriting chromosomes * In a literal sense, children do not inherit particular physical traits from their parents * It is genes that are actually inherited Inheritance of Genes * Genes are the units of heredity and are made up of segments of DNA * Genes are passed to the next generation via reproductive cells called gametes (sperm and eggs)

Reproduction in Human

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P P T 2 REPRODUCTION IN HUMANS OBJECTIVE ? Describe the process of sexual reproduction ? Site of fertilization ? Role of cell division ? Significance of implantation and gestation 1 ?Ovulation 2 ? Fertilization 3 ? Implantation 1. OVULATION(DAY 0) ? Ovulation releases an egg, which enters the fallopian tube. ? Usually occurs on the 14th day from the beginning of menstruation. ? One egg is released every month by one of the ovaries. 2. FERTILIZATION ? Fertilisation occurs. A sperm enters the egg and the nuclei of the egg and the sperm fuses, forming a zygote. ? About 100 million sperms are released into the vagina. ? Only one sperm will fertilize the egg. ? Upon fertilization, the membrane of the egg

Plant Reproduction Notes

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Form & Function in Flowering Plants ? Reproduction: Responses Plant Reproduction: Vegetative reproduction: The process of fragmentation, whereby small pieces of the organism form a complete new organism is common in both lower plants and lower animals. As both plants and animals became more specialized they generally lost the capacity to reproduce by fragmentation. In some plants specialized structures are produced, such as buds, propagules, bulbils, gemmae and others. In flowering plants vegetative multiplication can take place via cuttings from the aerial stem, rhizome, tuber, corm, bulb, stolon, runner, leaves, or in some cases even roots. Small pieces of the structure can, through mitosis and cell

Bio 220 Principles of Physiology and Development

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Bio 220 Notes Prokaryotes: 3.2 billion years ago Cell wall = peptidoglycans gram neg - lipopolysaccharides secreted outside of cell wall No internal compartments Unicellular and small (1-5 um) Most have single chromosome Transcription and translation occurs in the same location Eukaryotes: 2.1 billion years ago compartmentalization = organelles you can be more efficient with reaction vessels (concentrate functions) You can get by with fewer enzymes if you concentrate them into organelle, its cheaper Endosymbiants Mitochondria divide at their own rate, replicate independently of cell they live in Has its own DNA, circular First endosymbiants Cell size varies greatly RBC are the smallest and neurons are the largest/longest Plasma Membrane

Chapter 12 Notes

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Biology 240 SI Session #10 Chapter 12 SI Leader: Lauren Curtis Email: [email protected] Prokaryotes: Describe the process of 'binary fission' : Binary fission is the process by which a prokaryotic cell cell reproduces asexually by dividing in half. This does not include mitosis in prokaryotes, but a process all in it's own. The cell duplicates it's DNA, doubling in size, and then splits into two daughter cells. Here are some terms you need to be familiar with in regards to cell division... Chromatin: A DNA-protein complex, represents DNA in it's unfolded and non condensed form. Chromosomes: Represents DNA folded and condensed down as the cell gets ready to divide. It organizes the DNA in a way where parts won't get lost when the cell splits in half.

Fetal Circulation

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Hammad Mughal Fetal Circulation Anatomy and Physiology Mr. Ehnstrom January, 17, 2013 Fetal Circulation The fetal circulation is the circulatory system of a baby, the fetal circulation consists of the placenta and the blood vessels within the placenta. The fetal circulation is part of a larger circulation, the placenta circulation. The placenta circulation is divided into two parts: the maternal circulation and the fetal circulation.

AP Biology Campbell 8th edition Chapter 13 Study Guide

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STUDY GUIDE: CH. 13 MEIOSIS AND SEXUAL LIFE CYCLE AN INTRODUCTION TO HEREDITY 1. Explain why organisms reproduce only their own kind and why offspring more closely resemble their parents than unrelated individuals of the same species. -We pass coded information in the form of DNA to our offspring -DNA can change in increments -Within species there may be significant variation -The more distantly related, the more different 2. Explain what makes heredity possible. -DNA is copied and then passed -Inheritance is an orderly, quantitative process -Most often, matched sets of genes are inherited from two parents 3. Distinguish asexual and sexual reproduction. -Asexual- one parent, offspring=clone, DNA passed was grouped by mitosis, faster, simpler, less energy,

AP Biology Campbell 8th edition Chapter 12 Study Guide

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STUDY GUIDE: CH. 12 THE CELL CYCLE THE KEY ROLES OF CELL DIVISION 1. Explain how cell division functions in reproduction, growth, and repair. -Single-celled and other organisms reproduce asexually by cell division -Asexual spores, binary fissiion in bact., growth, breakage, and estab. Of vines -Growth may increase the sizes or numbers of cells -Wounding releases growth factors that stimulate mitosis 2. Describe the structural organization of the genome. -Organisms may have hundreds to tens of thousands of genes -Genes, controlling sequences, spacers, and junk are strung on chromosomes -Chromosome numbers -Bacteria may have one or a few circular or linear chromosomes -Eukaryotes may have one to >1000 linear chromosomes

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