Xulashada dabiiciga ah

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I can explain how variation and competition lead to the natural selection of individuals with the most helpful characteristics.

Muuji qoraalka

Variation within a population of a species means some individuals are better adapted to compete and survive. The fittest (better adapted) individuals are more likely to survive to reproduce. These individuals are more likely to pass on heritable, advantageous features to their offspring. This is natural selection, and causes the advantageous features to become more common in each generation of offspring. Changes in environmental conditions, including changes caused by humans, can affect natural selection.

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Imtixaannada

1. Geelku waxay ku kaydiyaan baruurta huumbeerkooda. Maxay tahay sababta ay tani u tahay la qabsiga (adaptation) faa'iido u leh ku noolaanshaha jawi kulul?
- baruurta waxay kordhisaa luminta kulaylka huumbeerka
- Jawaabta saxda ah:in aan baruurta lagu kaydin jirka inteeda kale waxay u oggolaanaysaa in kulaylka si fudud loo lumiyo
- baruurta ku jirta huumbeerka waxay hoos u dhigtaa luminta kulaylka huumbeerka
2. Hal dheddig oo duqsi (house fly) ah ayaa dhalin karta ilaa 500 ukun. Ukumahaasi waxay u koraan dixiri (maggots) kuwaas oo quudiya qashinka cuntada. Maxaa sabab u ah in aysan dhamaan dixirigu sii noolaan karin si ay u noqdaan duqsi wayn?
- dhammaantood waxay si isku mid ah ugu habboon yihiin deegaanka
- waxay u tartamayaan lammaane
- Jawaabta saxda ah:cunto kuma filna
- dixirigu waxay noolaadaan maalmo kooban oo keliya
3. Labadan deerka labka ah (stags) ayaa isu tartamaya. Waa maxay kheyraadka ay isku tartami karaan?
- Jawaabta saxda ah:cunto
- iftiin
- saaxiibbo (mates)
- geedaha qaada (pollinators)
- kuwa faafiya iniinaha (seed dispersers)
4. Dawacooyinka Arctic waxay ku nool yihiin dhulka Arctic waxayna u habeysan yihiin inay ku noolaadaan heerkul hooseeya. Kee ka mid ah kuwan soo socda ayaa ah hababka uu u habeysan yahay dawacada Arctic?
- Jawaabta saxda ah:dhogor baruur leh ayaa ka caawisa inay biyaha iska difaacdo si ay u degdegto inay engegaan
- dhego waaweyn si ay u yareeyaan luminta kulaylka
- jaakad gaaban si ay u yareeyaan luminta kulaylka
- suulal cagaha ayaa ka caawiya inay cagaha ku ilaashadaan dhulka qaboobaha ah

1. Dadka ama xayawaanka ku nool beel kasta, dhirta ama xayawaanka, ma aha kuwa isku mid ah. Tusaale ahaan, dadku waxay leeyihiin midabyo indho oo kala duwan. Waa maxay ereyga saynisyahannadu u adeegsadaan inay ku qeexaan kala duwanaanshahan?
- tartanka
- xulashada dabiiciga ah
- Jawaabta saxda ah:kala duwanaanshaha (variation)
2. Wakhtigii warshadaha (industrial revolution), noocyada madow ee aboorka (peppered moths) ayaa noqday kuwa sii badanaya. Waa maxay sharaxaadda ugu fiican ee arrintan?
- noocyada madow ee aboorka waxay u fududayd ugaarsadayaasha inay arkaan
- Jawaabta saxda ah:aboorka madow wuxuu ahaa mid si fiican u qarsooma (camouflaged)
- qiiqa (soot) ka yimid gubashada dhuxusha ayaa aboorka ka dhigay madow
- isbeddelku wuxuu ahaa dhacdo aan sabab lahayn (random event).
3. Si xulashada dabiiciga (natural selection) ay u dhacdo, astaamuhu waa inay ahaadaan ...
- kuwa ay keento deegaanka.
- kuwa la barto.
- Jawaabta saxda ah:kuwa la dhaxlo (inherited).
- kuwa ay keento hab-nololeedka.

Waxa ardaydu arkaan

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