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bio156 quiz 2




Question;1;of 30;Life is organized in a hierarchical fashion. Which one of the following sequences illustrates that hierarchy as it increases in complexity?;ecosystem? population? organ system? cell? community? molecule? organ? organism? tissue;cell? molecule? organ system? organ? population? tissue? organism? ecosystem? community;organism? organ system? tissue? population? organ? community? cell? ecosystem? molecule;molecule? cell? tissue? organ? organ system? organism? population? community? ecosystem;ecosystem? molecule? cell? tissue? organism? organ system? organ? community;Question;2;of 30;The;tree in your backyard is home to two cardinals, a colony of ants, a;wasp's nest (a colony of wasps), two squirrels, and millions of;bacteria. Together, all of these organisms represent;a species.;a community.;a population.;an ecosystem.;the biosphere.;Question;3;of 30;The ultimate source of energy flowing into nearly all ecosystems is;wind.;sunlight.;electricity.;geothermal vents.;radioactivity.;Question;4;of 30;A consumer eating a producer represents;a transfer of chemical nutrients and energy.;a transfer of chemical nutrients but not a transfer of energy.;a transfer of energy but not a transfer of chemical nutrients.;neither a transfer of chemical nutrients nor a transfer of energy.;Question;5;of 30;The formation of systems typically results in the appearance of novel characteristics called;emergent properties.;negentropic domains.;disengaged traits.;reoccurring phenomena.;renewed characteristics.;Question;6;of 30;A;scientist examining a group of cells under the microscope notices the;presence of nuclei within these cells. Chemical tests reveal that each;cell is photosynthetic and is surrounded by a wall composed of;cellulose. These cells must come from an organism that is a member of;the Kingdom;Monera.;Protista.;Plantae.;Fungi.;Animalia.;Question;7;of 30;Which one of the following statements is not consistent with Darwin's mechanism of natural selection?;Individuals in a population exhibit variations, some of which are heritable.;Individual organisms exhibit genetic change during their life spans to better fit their environment.;Factors in the environment result in some organisms with better reproductive success than others.;Natural selection is based in part on the overproduction of offspring.;Natural selection can lead to the appearance of new species.;Question;8;of 30;A hypothesis is;the same as a theory.;a tentative answer to some question.;an explanatory idea that is broad in scope and supported by a large body of evidence.;a widely accepted idea about a phenomenon.;a widely accepted theory that is broad in scope and supported by a large body of evidence.;Question;9;of 30;A scientist performs a controlled experiment. This means that;the experiment is repeated many times to ensure that the results are accurate.;the;experiment proceeds at a slow pace to guarantee that the scientist can;carefully observe all reactions and process all experimental data.;two experiments are conducted, one differing from the other by only a single variable.;two experiments are conducted, one differing from the other by two or more variables.;one experiment is performed, but the scientist controls the variables.;Question;10;of 30;The nucleus of an atom contains;protons and neutrons.;protons and electrons.;only neutrons.;only protons.;only electrons.;Question;11;of 30;Your instructor asks you to look into your microscope to see a prokaryotic cell. You will be looking for a cell that;has a nucleus and a membrane.;has a membrane, but no nucleus.;makes up most of the tissues of your body.;is much larger than most cells in your body.;does not use DNA to code genetic information.;Question;12;of 30;Which of the following statements about radioactive isotopes is/are true?;The nuclei of radioactive isotopes are unusually stable, but the atoms tend to lose electrons.;When;given a choice between radioactive and nonradioactive isotopes of the;same atom, living cells are more likely to incorporate the radioactive;isotopes into their structures.;The;tracers typically used for diagnosing medical problems remain;radioactive in the body for a number of years, but give off very low;levels of radioactive energy.;The energy emitted by radioactive isotopes can break chemical bonds and cause molecular damage in cells.;All of the choices are true.;Question;13;of 30;The smallest unit of an element is;an atom.;an electron.;a neutron.;a proton.;Question;14;of 30;In conducting a proper scientific experiment, which of the following would you not do?;Conduct research into past experiments on the topic.;Change the data that you collect so that it matches how you thought the experiment would come out.;Formulate a hypothesis before you begin collecting data.;Include a control group in your experiment.;Repeat the experiment a number of times and make sure you have a large sample size.;Question;15;of 30;A(n) __________ forms when two atoms share electrons.;ion;element;covalent bond;ionic bond;Question;16;of 30;The term biodiversity refers to;all of the non-living components of any ecosystem.;how evolution specifically works by natural selection.;the tremendous variety of life all around us on Earth.;the amount of food available in any specific habitat.;the fact that producers always make enough food for all consumers.;Question;17;of 30;In plants, the transport of water from roots to leaves against the force of gravity is possible due to this property of water;Water's versatility as a solvent.;Cohesion.;Adhesion.;Evaporative cooling.;All of the above.;Question;18;of 30;The ability of water molecules to form hydrogen bonds with other water molecules is critical to;evaporative cooling of skin surfaces.;the movement of water from the roots of a tree to its leaves.;the milder temperatures of coastal regions compared to inland areas.;the ability of certain insects to walk on the surface of water.;all of these factors.;Question;19;of 30;As ice melts;hydrogen bonds are broken.;water molecules become less tightly packed.;the water becomes less dense.;covalent bonds form.;All of the choices are true.;Question;20;of 30;A solute is;the dissolving agent of a solution.;the liquid portion of a solution.;usually water in living cells.;the substance that is dissolved in solution.;the dissolving agent of a solution, which is usually oxygen in living cells.;Question;21;of 30;Compared to a solution of pH3, a solution of pH1 is;100 times more acidic.;10 times more acidic.;neutral.;10 times more basic.;100 times more basic.;Question;22;of 30;Carbon is able to form an immense diversity of organic molecules because of carbon's;tendency to form covalent bonds.;ability to bond with up to four other atoms.;capacity to form single and double bonds.;ability to bond together to form extensive, branched, or unbranched carbon skeletons.;All of the choices are correct.;Question;23;of 30;Many names for sugars end in the suffix;-acid.;-ose.;-hyde.;-ase.;-ing.;Question;24;of 30;Which one of the following lists contains only polysaccharides?;sucrose, starch, and cellulose;starch, amino acids, and glycogen;cellulose, starch, and glycogen;nucleotides, glycogen, and cellulose;fructose, cellulose, and glucose;Question;25;of 30;A diet high in animal products may increase the risk for atherosclerosis. This is because;most animal fats are unsaturated and most animal products contain high levels of steroids.;most animal fats are hydrogenated oils and most animal products contain high levels of phospholipids.;most animal fats are used for energy storage and most animal products contain high levels of unsaturated fats.;most animal fats are saturated and some animal products contain trans fats.;most animal products contain high levels of unsaturated oils and anabolic steroids.;Question;26;of 30;Sucrose is formed;from two glucose molecules.;from two monosaccharides by dehydration synthesis.;when ionic bonds link two monosaccharides.;when water molecules are added to two monosaccharides.;when glucose and lactose are combined.;Question;27;of 30;DNA differs from RNA because DNA;contains thymine in place of uracil.;consists of a single rather than a double polynucleotide strand.;contains the sugar ribose rather than the sugar deoxyribose.;contains phosphate groups not found in RNA.;All of the above choices are correct.;Question;28;of 30;Glucose molecules are to starch as __________ are to proteins.;oils;amino acids;fatty acids;waxes;lards;Question;29;of 30;Nucleotides;contain nitrogenous bases.;contain sugar molecules.;contain phosphate groups.;can be linked together to form nucleic acids.;All of the choices are correct.;Question;30;of 30;Genetic information is encoded in the;quaternary structure of a protein.;sequence of nucleotides in DNA.;degree of saturation of fatty acids.;length of glycogen.;linear sequence of amino acids in a polypeptide.


Paper#63225 | Written in 18-Jul-2015

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