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Chemistry LibreTexts

6.1 Unit 6 Exam

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  • cc_profilecc.exam.v0p1qmd_assessmenttypeExaminationqmd_scoretypePercentagecc_maxattempts1
    cc_profilecc.multiple_choice.v0p1Organisms are named and classified based on physical characteristics inevolutionary trees.Linnaean taxonomy.cladograms.molecular clocks.2100cc_profilecc.multiple_choice.v0p1Which of the following lists Linnaean taxa in the correct order from general to specific?phylum, order, family, genuskingdom, order, class, phylumfamily, phylum, genus, speciesclass, order, species, genus5100cc_profilecc.multiple_choice.v0p1In the Linnaean system of classification, which of the following is most commonly defined as a group of organisms that can breed and produce offspring?phylumspeciesgenusorder10100cc_profilecc.multiple_choice.v0p1How many domains are there in the most current tree of life?sixfivethreetwo15100cc_profilecc.multiple_choice.v0p1How many kingdoms are there in the most current tree of life?twofivethreesix20100cc_profilecc.multiple_choice.v0p1The modern classification system is mainly based onmutation rates.common ancestry.physical  similarities.binomial nomenclature.22100cc_profilecc.multiple_choice.v0p1The name <i>Canis lupis</i> is an example ofa domain and clade.binomial nomenclature.a phylogeny.27100cc_profilecc.multiple_choice.v0p1The genetic material of a virus consists ofDNA only.capsids.surface proteins.RNA or DNA.32100cc_profilecc.multiple_choice.v0p1A viral capsid is composed oflipids.DNA.carbohydrates.proteins.36100cc_profilecc.multiple_choice.v0p1How does the DNA of a bacteriophage enter a host cell?injectionendocytosisconjugationbinary fission37100cc_profilecc.multiple_choice.v0p1In a lysogenic infection, once the DNA of the virus is incorporated into the bacterial DNA, the DNA is called aprion.viroid.prophage.plasmid.43100cc_profilecc.multiple_choice.v0p1A bacteria that is capable of living in an environment with or without oxygen is called a(n)obligate anaerobe.obligate aerobe.facultative anaerobe.facultative aerobe.47100cc_profilecc.multiple_choice.v0p1Antibiotics are used to fightviral infections.fungal infections.HIV infections.bacterial infections.52100cc_profilecc.multiple_choice.v0p1Prokaryotes reproduce byendocytosis.fermentation.binary fission.reverse transcription.55100cc_profilecc.multiple_choice.v0p1The paramecium's cilia help the organismform a shell.control internal water genetic material.swim and capture food.60100cc_profilecc.multiple_choice.v0p1The term protozoa is generally used to describeanimal-like protists.plantlike protists.funguslike protists.bacteria-like protists.61100cc_profilecc.multiple_choice.v0p1Plantlike protists have which of the following traits in common with plants?They both have chlorophyll.They are both motile.They are both heterotrophic.They are both decomposers.65100cc_profilecc.multiple_choice.v0p1Fungal cell walls are made ofcellulose.agar.chitin.cilia.71100cc_profilecc.multiple_choice.v0p1Which of the following organisms move by the use of pseudopods?zooflagellatesforaminiferaparameciaalgae74100cc_profilecc.multiple_choice.v0p1Slime molds are funguslike protists, but they are not fungi. Why?They are decomposers.They can move.They contain chlorophyll.They have a stem.78100cc_profilecc.multiple_choice.v0p1Yeast that makes bread rise is a type of single-celled<i>hypha.</i><i>sac fungus.</i><i>mycelium.</i>bread mold.82100cc_profilecc.multiple_choice.v0p1The process in which yeast reproduce by forming a daughter cell that is genetically identical but initially smaller in size is calledfission.budding.conjugation.meiosis.86100cc_profilecc.essay.v0p1qmd_computerscoredNoHow does a lytic infection differ from a lysogenic infection?100cc_profilecc.essay.v0p1qmd_computerscoredNo<p>The linnaean classification system is based solely on physical characteristics. How has the classification of organisms changed since Linnaeus developed his taxonomy?</p> <p>In your answer:</p> <ul> <li>explain how cladistics differsfrom Linnaean taxonomy</li> <li>explain how new technologies in molecular biology and DNA research have affected the Linnaean classification system</li> </ul>100cc_profilecc.essay.v0p1qmd_computerscoredNo<p>Viruses are infectious particles made only of nucleid acid surrounded by a protein coat. Viruses are not considered living and therefore are not found in the Linnaean system of taxonomy. Why are viruses not considered to be living?</p> <ul> <li>Explain how viruses differ structurally from living organisms such as bacteria</li> <li>Explain the condistions needed for viruses to reproduce</li> </ul>100cc_profilecc.essay.v0p1qmd_computerscoredNo<p>Antibiotic-resistant bacteria are a serious public health concern. Many bacteria have become resistant to many antibiotics over the years. What has contributed to this problem?</p> <ul> <li>Explain how the misuse of antibiotics can increase the number of resistant bacteria</li> <li>Explan how plasmid exchange contributes to the multi-drug resistant strains</li> <li>Explain how natural selection favors this resistance</li> </ul>100