Chapter 10 - PrepU flashcards _ Quizlet

Cth ey d iv erg ean d ev en tu ally co n v erg e d th

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Unformatted text preview: e o f b ack g ro u n d ex tin ctio n s o v er th e time p erio d b etween 5 0 0 an d 2 0 0 millio n y ears ag o ? a ) a ro u n d 4 0 % b ) a ro u n d 2 0 % c ) a ro u n d 6 0 % d ) a ro u n d 1 0 % e ) a ro u n d 5 5 % a ro u n d 1 0 % Th e g rap h ab o v e sh o ws d ifferen ces in th e rates o f th e two ty p es o f ex tin ctio n . th e d ata p o in ts fo r th e b ack g ro u n d ex tin ctio n s n ev er g et mu ch h ig h er th an 1 1 o r 1 2 % Wh at d istin g u ish es th e mass ex tin ctio n s fro m th e b ack g ro u n d d istin ctio n s in th is fig u re? a) larg e mass ex tin ctio n s (o v er 4 0 %) are o ccu rin g at least ev ery 1 0 0 millio n y ears b ) th e rates o f mass ex tin ctio n s ten d to sig n ifican tly lo wer c) th e d ata p o in ts fo r th e b ack g ro u n d ex tin ctio n s n ev er g et mu ch h ig h er th an 1 1 o r 1 2 % d ) b ack g ro u n d ex tin ctio n s o ccu r at h ig h er rates th an mass ex tin ctio n s e) mass ex tin ctio n rates remain relativ ely co n stan t Wh ich o f th e fo llo win g accu rately states th e g o al o f b io lo g ical classificatio n ? th e g ro u p in g o f o rg an isms in to categ o ries th at reflects th eir ev o lu tio n ary h isto ry a) th e g ro u p in g o f o rg an isms in to th ree larg e p o ly p h y letic categ o ries b ) th e sep aratio n o f all o rg an isms in to fo u r sep arate k in g d o ms c) th e g ro u p in g o f o rg an isms in to categ o ries th at reflects th eir ev o lu tio n ary h isto ry d ) th e ack n o wled g emen t th at an cestral eu k ary o tes g av e rise to an cestral b acteria a n d a rc h a e a n s e) a way to in clu d e all b io lo g ical en tities, in clu d in g v iru ses, in th e tree o f life An alo g o u s featu res are p ro b lematic wh en co n stru ctin g ev o lu tio n ary trees b ecau se: a) th ey are th e resu lt o f co mmo n an cestry rath er th an n atu ral selectio n b ) th ey are b ased o n co mp arativ e an ato my rath er th an emb ry o lo g y . c) th ey d iv erg e an d ev en tu ally co n v erg e. d ) th ey are th e resu lt o f n atu ral selectio n rath er th an co mmo n an cestry . e) th ey are b ased o n DNA rath er th an co mp arativ e an ato my . th ey are th e resu lt o f n atu ral selectio n rath er th an co mmo n an cestry . Wh ich o f th e fo llo win g statemen ts is INCORRECT? Ox y g en was ab u n d an t in th e Earth 's early atmo sp h ere, b efo re th e o rig in o f life. a) Ox y g en was ab u n d an t in th e Earth 's early atmo sp h ere, b efo re th e o rig in o f life. b ) Ex p erimen ts lik e Miller an d Urey 's d o n o t wo rk in th e p resen ce o f o x y g en . c) En v iro n men ts with o u t o x y g en are th e b est fo r p reserv in g fo ssils. d ) Ox y g en attack s ch emical b o n d s an d ex tracts electro n s, wh ich p rev en ts th e fo rmatio n o f co mp lex mo lecu les. e) Th e accu mu latio n o f o x y g en in th e early en v iro n men t was a resu lt o f th e p h o to sy n th etic activ ity o f terrestrial p lan ts. Sev eral facto rs in flu en ce wh eth er a family o r a sp ecies b eco mes ex tin ct­­th ese in clu d e co mp etitio n an d ch an g in g en v iro n men tal co n d itio n s. th e g reen lin e in d icatin g rate o f b ack g ro u n d ex tin ctio n s is n o t straig h t Wh ich g rap h ical featu re o f th e d ata o n b ack g ro u n d ex tin ctio n s is related to th is issu e? a) th e g reen lin e in d icatin g rate o f b ack g ro u n d ex tin ctio n s is n o t straig h t b ) rates o f mass ex tin ctio n s are sh o wn to h ig h er th an b ack g ro u n d ex tin ctio n s c) d ata is fo r families an d n o t sp ecies d ) th e g reen lin e n ev er g ets h ig h er th an a ro u n d 1 5 % e) o n ly d ata fro m th e last 5 0 0 millio n y ears a re s h o w n Classificatio n is an imp o rtan t asp ect o f u n d erstan d in g an d d escrib in g th e man y life fo rms o n eart...
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