Dallas ISD Science Depatment When a sea urchin egg is removed from the ocean and placed in freshwater, the egg swells and bursts. Which of these caused water to enter the egg? F Coagulation G Sodium pump H Active transport J Osmosis
Dallas ISD Science Depatment Viruses differ from bacteria in that all viruses F cause insect-borne diseases G can be destroyed by antibiotics H have rigid cell walls J must be reproduced in living cells
Dallas ISD Science Depatment J must be reproduced in living cells
Dallas ISD Science Depatment Why are photosynthesis and cellular respiration often considered opposites? F Photosynthesis produces twice as many ATP molecules as cellular respiration G Water is released during photosynthesis and consumed during cellular respiration H Photosynthesis occurs during the day, and cellular respiration occurs at night J Oxygen is produced during photosynthesis and used during cellular respiration
Dallas ISD Science Depatment J Oxygen is produced during photosynthesis and used during cellular respiration
Dallas ISD Science Depatment Which of the following best describes the question this set of procedures was designed to answer? A Can a substance from dead bacteria transform living bacteria? B Can R bacterial cells survive heating? C Can dead bacterial cells confer immunity to a living host? D Can bacterial cells be isolated from a healthy host?
Dallas ISD Science Depatment A Can a substance from dead bacteria transform living bacteria?
Dallas ISD Science Depatment Coat color in mice varies greatly, ranging from black to grizzly-gray, black-and-white, spotted, or white. The nucleus from a body cell of a grizzly-gray mouse is fused with an egg from a black mouse from which the nucleus has been removed. The egg begins to divide and is then transplanted into a female white mouse. What will be the most likely coat color of the offspring? F Black G Black with white spots H Grizzly gray J White
Dallas ISD Science Depatment Which molecule is most responsible for determining an organisms eye color, body structure, and cellular enzyme production? A Complex starch B Fatty acid C Carbohydrate D Deoxyribonucleic acid
Dallas ISD Science Depatment D Deoxyribonucleic acid
Dallas ISD Science Depatment Which of these represents the DNA segment from which this section of mRNA was transcribed? A ACTAAG B TCUTTG C GAAUCU D UCCTGA
Dallas ISD Science Depatment The assembly of a messenger RNA strand that normally begins with UAC has been changed so that the newly assembled messenger RNA strand begins with UAG. Which of the following will most likely occur? A The protein will be missing the first amino acid. B The amino acids that make up the protein will all be different. C The mRNA will become attached to a ribosome. D The production of the protein will be stopped.
Dallas ISD Science Depatment D The production of the protein will be stopped.
Dallas ISD Science Depatment Which body system is directly responsible for delivering nutrients to cells throughout the body? A Circulatory system B Integumentary system C Endocrine system D Respiratory system
Dallas ISD Science Depatment A Circulatory system
Dallas ISD Science Depatment The diagram illustrates the parts of this flower. Which of these parts are not directly involved in sexual reproduction? A Stigma and style B Sepal and pedicel C Anther and filament D Receptacle and ovary
Dallas ISD Science Depatment B Sepal and pedicel
Dallas ISD Science Depatment When a person is frightened by a wild animal, some organ systems immediately become active, while others are suppressed. Which of these systems is likely to be suppressed? F Muscular system G Respiratory system H Endocrine system J Digestive system
Dallas ISD Science Depatment J Digestive system
Dallas ISD Science Depatment The diagram represents a human arm. Which structure is most responsible for moving the arm to a straighter position? A. Tendons of origin B. Biceps C. Radius D. Triceps
Dallas ISD Science Depatment In the diagram above, one cell created and releases chemicals that travel to a second cell and quickly induce that cell into action. This diagram represents part of the – A. endocrine system B. skeletal system C. muscular system D. nervous system
Dallas ISD Science Depatment The bullfrog, Rana catesbeiana, is most closely related to the – F spotted chorus frog, Pseudacris clarki G Asian flying frog, Polypedates leucomystax H northern leopard frog, Rana pipiens J African bullfrog, Pyxicephalus adspersus
Dallas ISD Science Depatment Some zooplankton belong to the kingdom Protista. Members of this kingdom are characterized as – A.having segmented bodies with jointed appendages B. containing one or more eukaryotic cells C. laying eggs with a leathery protective shell D. having a four-chambered heart
Dallas ISD Science Depatment B. containing one or more eukaryotic cells
Dallas ISD Science Depatment Which of the following correctly sequences organisms from simplest to most complex? A. Eubacteria, plant, protist B. Eubacteria, protist, animal C. Fungi, animal, archaebacteria D. Plant, fungi, protist
Dallas ISD Science Depatment B. Eubacteria, protist, animal