life science quiz (perfect answer) 20 questions
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LIFE SCIENCE QUIZ (PERFECT ANSWER) 20 QUESTIONSLIFE SCIENCE QUIZ (PERFECT ANSWER) 20 QUESTIONS QUESTION 1Oxygen built up in the atmosphere approximately 2 billion years ago andA. destroyed ozone forming more oxygen.B. occurred due to carbon dioxide being split by lightning strikes.C. could not have occurred without the oxygen coming from outer space.D. occurred because aerobic organisms required the oxygen.E. helped to form the ozone layer that is so important to life today.QUESTION 2Which form of bacterial cells is rod shaped?A. vibriosB. bacilliC. rhodiusD. cocciE. spirillaQUESTION 3Most bacteria areA. chemoautotrophs.B. symbionts.C. heterotrophs.D. photoautotrophs.E. microbial predators.QUESTION 4Rickettsias belong to which major group of bacteria?A. spirochetesB. ArchaeaC. cyanobacteriaD. virusesE. proteobacteriaQUESTION 5What term is used to indicate a characteristic that is shared and inherited from a common ancestor?A. homologous traitB. cladistic traitC. outgroupsD. derived traitE. analogous traitQUESTION 6In bacteria, the cell wall is composed mainly ofA. peptidoglycans.B. various polysaccharides.C. glycoproteins.D. lipids.E. proteins.QUESTION 7Eukaryotic cells are thought to haveA. evolved before prokaryotic cells.B. first appeared with tough cell walls.C. first appeared as parts of multicellular organisms.D. developed when mitochondria grew much larger in size that they had been previously.E. appeared about 2.1 billion years ago.QUESTION 8Kelps are a form of what group of protists?A. dinoflagellatesB. water moldsC. slime moldsD. brown algaeE. ciliatesQUESTION 9Atmospheric chemists think that Earth’s first atmosphereA. consisted of carbon in the form of carbon monoxide.B. was very similar to today’s atmosphere.C. contained no oxygen atoms.D. consisted of carbon in the form of carbon dioxide.E. contained nitrogen in the form of ammonia and nitrogen gas.QUESTION 10Prions are composed ofA. DNA, RNA, and protein.B. RNA.C. protein.D. DNA and protein.E. DNA.QUESTION 11Endospores formA. to produce two offspring from every one parental cell.B. as a means of genetic recombination.C. when the environmental conditions are favorable.D. in response to adverse conditions.E. during binary fission.QUESTION 12Paleontologists have found fossils dating back 3.6 billion years. These closely resembleA. fungi.B. small invertebrate animals.C. today’s simplest plants.D. nothing alive today.E. blue-green algae present today.QUESTION 13What is the main difference between protists and bacteria?A. Bacteria have DNA, protists do not.B. Protists cannot cause infections, bacteria canC. Protists are unicellular, bacteria are multicellular.D. Protists have a nucleus, bacteria do notE. Bacteria are always gram-negative, protists are gram-positiveQUESTION 14All but one of the following are false regarding protists. Identify the true statement.Most protists are single-celled organisms; some are multicellular.A. Protists have cell walls composed mainly of peptidoglycans.B. Protists are prokaryotic.C. Protists do not have the ability to move on their own.D. All protists are single-celled organisms.LIFE SCIENCE QUIZ (PERFECT ANSWER) 20 QUESTIONSTRANSCRIPT
10/12/2015 TheAceStudent: LIFE SCIENCE QUIZ (PERFECT ANSWER) 20 QUESTIONS
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LIFE SCIENCE QUIZ (PERFECT ANSWER) 20 QUESTIONS
QUESTION 1Oxygen built up in the atmosphere approximately 2 billion years ago andA. destroyed ozone forming more oxygen.B. occurred due to carbon dioxide being split by lightning strikes.C. could not have occurred without the oxygen coming from outer space.D. occurred because aerobic organisms required the oxygen.E. helped to form the ozone layer that is so important to life today.QUESTION 2Which form of bacterial cells is rod shaped?A. vibriosB. bacilliC. rhodiusD. cocciE. spirillaQUESTION 3Most bacteria areA. chemoautotrophs.B. symbionts.C. heterotrophs.D. photoautotrophs.E. microbial predators.QUESTION 4Rickettsias belong to which major group of bacteria?A. spirochetesB. ArchaeaC. cyanobacteriaD. virusesE. proteobacteriaQUESTION 5What term is used to indicate a characteristic that is shared and inherited from a common ancestor?A. homologous traitB. cladistic traitC. outgroupsD. derived traitE. analogous traitQUESTION 6In bacteria, the cell wall is composed mainly ofA. peptidoglycans.B. various polysaccharides.C. glycoproteins.D. lipids.E. proteins.QUESTION 7
LIFE SCIENCE QUIZ (PERFECT ANSWER) 20 QUESTIONS
10/12/2015 TheAceStudent: LIFE SCIENCE QUIZ (PERFECT ANSWER) 20 QUESTIONS
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Eukaryotic cells are thought to haveA. evolved before prokaryotic cells.B. first appeared with tough cell walls.C. first appeared as parts of multicellular organisms.D. developed when mitochondria grew much larger in size that they had been previously.E. appeared about 2.1 billion years ago.QUESTION 8Kelps are a form of what group of protists?A. dinoflagellatesB. water moldsC. slime moldsD. brown algaeE. ciliatesQUESTION 9Atmospheric chemists think that Earth’s first atmosphereA. consisted of carbon in the form of carbon monoxide.B. was very similar to today’s atmosphere.C. contained no oxygen atoms.D. consisted of carbon in the form of carbon dioxide.E. contained nitrogen in the form of ammonia and nitrogen gas.QUESTION 10Prions are composed ofA. DNA, RNA, and protein.B. RNA.C. protein.D. DNA and protein.E. DNA.QUESTION 11Endospores formA. to produce two offspring from every one parental cell.B. as a means of genetic recombination.C. when the environmental conditions are favorable.D. in response to adverse conditions.E. during binary fission.QUESTION 12Paleontologists have found fossils dating back 3.6 billion years. These closely resembleA. fungi.B. small invertebrate animals.C. today’s simplest plants.D. nothing alive today.E. bluegreen algae present today.QUESTION 13What is the main difference between protists and bacteria?A. Bacteria have DNA, protists do not.B. Protists cannot cause infections, bacteria canC. Protists are unicellular, bacteria are multicellular.D. Protists have a nucleus, bacteria do notE. Bacteria are always gramnegative, protists are grampositiveQUESTION 14All but one of the following are false regarding protists. Identify the true statement.
10/12/2015 TheAceStudent: LIFE SCIENCE QUIZ (PERFECT ANSWER) 20 QUESTIONS
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Most protists are singlecelled organisms; some are multicellular.A. Protists have cell walls composed mainly of peptidoglycans.B. Protists are prokaryotic.C. Protists do not have the ability to move on their own.D. All protists are singlecelled organisms.
LIFE SCIENCE QUIZ (PERFECT ANSWER) 20 QUESTIONS