Science in Action Notes_ Biological Diversity (2

Science in Action Notes_ Biological Diversity (2 - Science...

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Unformatted text preview: 1/30/12 Science in Action Notes: Biological Diversity (2.0) Science in Action Notes: Biological Diversity (2.0) Print 2.1 . A Closer L ook at Variation Va ia i i e f he c i ic a a ec f ec ie i a . T hi a ia i aa be a ea fi d a c a i , bec a e i a be a beha i a a ge e ic (c e a c de) dif ic a i ha e ab e e i di id a i hi a i e, hi e he , f he a e ec ie , i e i h. a e de c ec ie Genetic Trait Variations (Ob e i g Va ia i iH a Global Human T r ait s Sur ve Cha ac e i ic . 27) Inherited and Non- inherited C haracteristics Inherited (he i ab e) c ha ac e i ic a e h e ai hic h a e a ed ff ig di ec f hei a e . T he e ai a e a ed b a f he ge e ic a e ia ha i c bi ed f he a e d i g he ce feae d c i . He i ab e ai i c de, c a a d di i g i hi g c ha ac e i ic , ch a e e c , hai e, ic a d ea be . Non- inherited c ha ac e i ic a e ac i ed a d ec e a i a ed f ge e a i ge e a i . A h e ic i , a i ic abi i , eade hi a i ie a e a ea ed d i g he ea ea f if e. Discrete and C ontinuous Variations Discrete a ia i a e dif f e e c e i c ha ac e i ic ha ha e a def i i e f . T hi i c de h e i di id a , i hi a ec ie , ha ha e ei he e c ha ac e i ic , he i g e, he a ia i , f he c ha ac e i ic . C ontinuous a ia i a e dif f e e c e i c ha ac e i ic ha ha e a i de f a ia i , c h a heigh , h e i e, e c . Variation and the Env ironment Se ae a ia i a be i f e c ed b i i he i ed. E a e i c de: Cha ge i he Heigh a d ig e eigh c a ai f e ac i ic i h he e h gh i e he ea . T he e de a ia i he . be i f e c ed b die . 2.2 . Ase ual and Se ual Reproduction Ase ual Reproduction Ae a e dci T he e a e dif f e e Bi a Fi ce edquest.ca/component/ i i e - a d e ac h e fa e a e e a e . A f he dci : i g e- c e ed e i ide ga i e ff d ce i i g a e ide hi ic a a . T he c e he i ae . i ic a . /129-science-in-action-notes-biological-diversity-2 1/3 1/30/12 Science in Action Notes: Biological Diversity (2.0) (bac e ia, amoeba, algae) B dding - he pa en o gani m p od c e a b d (a malle e en e ion of i elf ), all de ac he i elf f om he pa en and bec ome a elf - iden ic al o he pa en . Co al al o ep od c e in hi (h d a , Spo e P od c ion - po e a e imila on he pa en , no b e a c h of hic h he ill g o nion of in o a ne ea a ,b hic h f f ic ien indi id al - do no de ac h hem el e , c o al) o eed , b a e p od c e d b o c ell . One pa en ma indi id al, iden ic al o i he di i ion of c ell p od c e man po e , pa en . (f ngi, g een algae, mo ld , f e n ) Vege a i e Rep od c ion - i c ing , nne , (c ole c ke , he ep od c ion of a plan no in ol ing a eed, inc l ding; be . plan , pide plan , a be ie , a pen, po a oe ) Se ual Reproduction Se al ep od c ion all in ol e f om hi nion ha e a mi of c ha ac e o he pa en . Se al ep od c ion doe ha e pec iali ed gametes ( ep od c i game e d ing ep od c ion). o indi id al o gani m . T he of f p ing ha a e p od c ed i ic , half f om one pa en and he o he half f om he no al a in ol e male and f emale pa en , b c an e c ell ha ha e onl one ole - o join i h ano he Se ual Reproduction in Animals Se al ep od c ion in animal in ol e game e . T he male game e a e c alled sperm cells, and he f emale game e a e c alled egg cells (o a). D ing ma ing, he pe m c ell and he egg c ell ni e o f o m a f e ili ed c ombina ion of c ell c alled a gote. T hi go e i he f i of man c ell of a ne indi id al. T hi go e ill begin o di ide in o o c ell and hi c on in e o be epea ed o e and o e e l ing in he de elopmen of an embr o. T hi emb o de elop in o a m l i- c ell la o gani m in ide he f emale (in mo mammal ) o , o ide (in an egg hell) in o he animal . Se ual Reproduction in Plants Se al ep od c ion in plan in ol e game e a ell, male game e and f emale game e joining, d ing fertili ation, o p od c e a go e and hen an emb o. Mo plan p od c e bo h male and f emale game e , hile ome p od c e one o he o he onl . edquest.ca/component/ /129-science-in-action-notes-biological-diversity-2 2/3 1/30/12 Science in Action Notes: Biological Diversity (2.0) Pollen c ai he a e ga e e a d i f d he stamen. Ov ules c ai he f e a e ga e e a d a e f d i he pistil. Pollination c c he ei a f e ed f he anther f he stamen he stigma f he pistil. C ross- pollination c c he pollen f e a i c a ied he stigma f a he ab i d, a e a i a (bee b ef ie ). C ross- fertili ation c c he a g ai f he ef a g be hic h g d he st le i he ov ar . T he ga e e ie d ce a gote, hic h he de e i a embr o. T hi a ha e i ide a seed, hic h ec he e b ad ide f d (cot ledon) f he e b he g i g c di i a e igh . Pa hic h a e d c ed, a a e f cross- fertili ation, a e ide ic a ei he a. Adv antages and disadv antages of Ase ual and Se ual Reproduction Va ia i a he a ec ie ie he he e i e c ha ge . Ase ual reproduction d e e iea ec ia i ed c e d ce a e a . I ca he ef e d ce a a e ic . T hi i a ad a age i ac e he e he ei e d e ' c ha ge e c h (bac e ia). B b i di g a a ge ai f ga i e ic he ec ie i ab e h i e. T he g ea di ad a age i ha he he ei e c ha ge , a f he ga i i die, if he d ha e he abi i ada he c ha ge. Se ual reproduction ha he ad a age he i g i i e he he e i e ce ae a f e e g . T hi ea f idi g c ha ge . T he ha he c a f a ia i ai di ad a d ce i hi a ec ie , age i ha hi a ai . Organisms that Reproduce both Se uall and Ase uall Sponges a e ga i d c e eed c a a ei e a c di i i ai . edquest.ca/component/ ha c a d ce b i h e a a d a e a . M a e d c e a e a (c ig, e ). De e di g he he a fe eg a ie , e ab i g he a ga i /129-science-in-action-notes-biological-diversity-2 ha c 3/3 ...
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