forgotten pair of shoes a few weeks ago. These weren’t just any old shoes to me but a rare pair of late 1970s Nike track racing shoes called Nike Vainqueur‚ and this wasn’t just an ordinary occasion to me either‚ for these old shoes of mine were to be worn that day for the first time in nearly 30 years by my 16 year old son Jeremy. I think we were both a little nervous that morning as we both prepared for him to race in his first athletics carnival at his new high school. My very first pair of Nike
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Economics 101 Spring 2011 Answers to Homework #1 Due 2/2/11 Directions: The homework will be collected in a box before the lecture. Please place your name‚ TA name and section number on top of the homework (legibly). Make sure you write your name as it appears on your ID so that you can receive the correct grade. Please remember the section number for the section you are registered‚ because you will need that number when you submit exams and homework. Late homework will not be accepted so make
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1.) VSEPR theory is a model that is used in chemistry which helps to predict the geometry of individual molecules from the number of electron pairs surrounding their central atoms. The molecule methane (CH4)‚ has a tetrahedral shape as it has 4 electron clouds‚ all of which are localized. This molecule is nonpolar because all the outer atoms are the same and are distributed symmetrically‚ the dipoles can cancel out even if polar bonds are present. 2.) The molecule of PCl3 is a polar molecule because
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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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divides along the equator‚ creating 2 haploid daughter cells A brief period of Interphase usually occurs between Meisois I and II‚ in which the cell grows‚ and DNA is replicated to prepare for meiosis. Meiosis 2: • Prophase II - sister chromatids pair up and attach to the spindle microtubule apparatus. • Metaphase II - sister chromatids line up at equator of cell due to the movement of the spindle microtubule apparatus. • Anaphase II - sister chromatids separate as spindle fibers pull them in
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Organic Chemistry‚ Fourth Edition Janice Gorzynski Smith University of Hawai’i Chapter 1 Lecture Outline Prepared by Layne A. Morsch The University of Illinois - Springfield Copyright © 2014 The McGraw-Hill Companies‚ Inc. Permission required for reproduction or display. 1 Bonding • Bonding is the joining of two atoms in a stable arrangement. • Through bonding‚ atoms attain a complete outer shell of valence electrons (stable noble gas configuration). • Atoms can form either ionic or covalent
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the diploid and haploid numbers as well as the morphology of the chromosomes. When assembling a karyotype‚ two chromosomes specify gender‚ XX for females and XY for males‚ while the remaining chromosomes are arranged from largest to smallest in pairs. Each pair is arranged based upon chromosome morphology‚ decreasing size‚ and autosome and sex chromosome distinguishes. Karyotyping is a useful tool used in evaluating genetic problems such as chromosomal alternations. The test identifies and examines
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division chromosomes align in homologous pairs. Points of contact form between members of the same homologous pair. The points of contact or crossing over between members of a homologous pair are the chiasmata. 3. The homologous pairs move to the equator of the cell. Equal lengths of the chromatids of the same homologous pair have broken off and crossed over. The chromosomes align at random and independantly. Only one possible arrangement is shown. 4. Homologous pairs align at random at the equator of
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blue Answer human eye can view only the color that is reflected‚ the remaining color in visible spectrum are being absorbed by the plant pigments for energy use. Molecule or Molecular ion | Valence shell Electron pairs | Bonding Electron pairs | Nonbonding Electron pairs | VSEPR Formula | Approx. Bond Angle | Geometric Shape | BrCl3 | 5 | 3 | 2 | AX3E2 | <90o | T-shaped | IF4- | 6 | 4 | 2 | AX4E2 | 90o | Square planar | CO2 | 2 | 2 | 0 | AX2 | 180o | Linear | OCl2 | 4 | 2
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electron configuration as a helium atom. Two hydrogen atoms can achieve a stable electron configuration by sharing their electrons and forming a Covalent bond. A covalent bond is a chemical bond in which two atoms share a pair of valence electrons. When two atoms shair one pair of electrons‚ the bond is called a singe bond. Molecules of Elements Two hydrogen atoms bonded together form a unit called a molecule. A molecule is a neutral group of atoms that are joined together by one or more
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