Cell Division and the Cell Cycle 1) Define the following terms: Meiosis The production of daughter cells that have one half the number of chromosomes as the parent cell. It enables organisms to reproduce sexually. Mitosis The production of two daughter cells that are identical to the parent cell. Parent cell=haploid‚ daughter cell=haploid. Parent cell=diploid‚ daughter cell=diploid. Chromosome A structure of nucleic acids and protein found in the nucleus of most living cells‚ which carry genetic
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to hatch * Euviparity – designates the viviparous condition Gametogenesis * Converts diploid (2N) into haploid cells (N)‚ sperm or ova * Originated from stem cell which grow into primary oocyte and primary spermatocyte * Undergo meiosis Stages of Development * Fertilization * Cleavage * Blastulation * Gastrulation * Neurulation * Organogenesis STAGES OF ANIMAL DEVELOPMENT FERTILIZATION * Sperm release enzymes that pierce the egg’s coat. * Receptor
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Prokaryotic cells vs. Eukaryotic cells Two Fundamentally Different Classes of Cells charcteristic Prokaryotic Cells Eukaryotic Cells word origins pro=before karyon=kernel or nucleus eu=true karyon=kernel or nucleus Domains of Bacteria 1. archaea or archaebacteria‚ more ancient in soil and water also in hostile environments‚ many without oxygen high salt/brine methanogens halophiles thermoacidophiles hot acidic springs 2. bacteria or eubacteria‚ more
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The studies of Robert Hooke 1665 into a plant material would allow the determination of a pore like regular structure surrounded by a wall of which he called cells’ this in itself unbeknownst to him‚ was the discovery of the fundamental unit of all living things. In 1838 a botanist called Schleiden derived the theory The basic unit of structure and function of all living organisms is the cell.’ Over 150 years later this can be regarded as one of the most familiar and important facts within the
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endosperm (D) hypocotyl (E) ovary 47. The embryo of which of the following organisms does NOT have an amnion? (A) a bird (B) a turtle (C) a lizard (D) a fish (E) a human 48. A human cell in prophase of mitosis can be distinguished from a human cell in prophase I of meiosis by the presence of (A) kinetochores in the mitotic cell (B) a spindle in the mitotic cell (C) twice as many chromosomes in the meiotic cell (D) half as many chromosomes in the meiotic cell (E) paired homologous
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Frederick Griffith | This person made an experiment that involved injecting mice with pneumonia: smooth S cells‚ rough R cells‚ heat-killed S cells‚ and heat-killed S cells with living R cells. | Avery‚ McCarty‚ and MacLeod | First to show that DNA was the genetic material‚ but not believed. Repeated Griffith’s experiment‚ but subjected the strains to different enzymes‚ isolating RNA‚ DNA‚ lipids‚ carbohydrates‚ and proteins. Only the DNA killed the mice; the others had the mice survive. | Hershey
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2010 – 2 – 1. N10/4/BIOLO/HPM/ENG/TZ0/XX [Question and image removed for copyright reasons] 2. What is the sequence of stages during the cell cycle? A. B. C. D. G1 mitosis G1 G1 S G1 G2 G2 G2 G2 S mitosis cytokinesis S cytokinesis mitosis cytokinesis S mitosis cytokinesis 8810-6001 – 3 – 3. N10/4/BIOLO/HPM/ENG/TZ0/XX The levels of iron in liver tissue from 12 rats fed on beef and 11 rats fed on plant
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Biology Project Autumn Brown 3rd block Mrs. Stephens More than 2‚000 years ago‚ Aristotle began grouping plants and animals into various categories. Although he did not consider the idea that different organisms were related by descent‚ he devised a system that placed these organisms in a hierarchy. Through classification systems‚ scientist have found it easier to find answers to important questions. This way
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Reproductive Systems (Ch. 15) Thursday 11/7 MID TERM EXAM III (Lectures 12-18) 19 Tuesday 11/12 Early Development (Ch. 16) 20 Thursday 11/14 Chromosomes and Sex Determination (Ch.17) 21 Tuesday 11/19 Cell Division: Mitosis and Meiosis (Ch. 17) 22
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Module 03 Quiz Review Sheet Be sure to read and review the Powerpoints for Chapters 1-3 and 5 for the Quiz! Module 1 - Foundations of Microbiology and Lab Safety – Chapters 1 & 2: Know the various classes of microorganisms and unique features and characteristics of each: Bacteria- one of the two domains of prokaryotes; all medically important prokaryotes are in the domain Bacteria. bacteria are single-celled or noncellular spherical or spiral or rod-shaped organisms that reproduce by fission. Protozoans-Group
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