Habarhoi ohirin

CHand namudi rastaniho hastand?

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Gunogunii rastaniho va paydoishi onho: Nabototi sayyorai mo khele gunogun ast. Dar on ziyoda az 350 hazor namudi rastaniho nashunamo mekunand. Pahnshavii rastaniho dar kurai Zamin yakkhela va barobar nestand. Dar beshazorhoi mintaqai tropiki (Hususan, tropikai namnok) az hama ziyodtar namudhoi gunoguni rastani meruyand. Onho mansubi tamomi guruhhoi tasnifotii olami …

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Marhilahoi asosii inkishofi olami nabotot

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Az rui omuzishi qabathoi kadimtarini qishri Zamin, aks (naqsh) va boqimondai sangshudai nabototu hayvonoti qadim olimon ba khulosae omadand, ki Zamin taqriban 4,5 — 5 milliard sol muqaddam vujud doshtaast. Taqriban 2,5 milliard sol pesh dar rui Zamin hayot vujud dosht. Dar on davraho tadrijan payvastagihoi nisbatan murakkabi organiki paydo …

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Hukmronii pushidatukhmon dar zamoni hozira

Dar bayni digar guruhi rastaniho pushidatukhmon yo rastanihoi guldor dar rui Zamin vase pahn shudaand. Onho dar jangalu buttazorho, margzoru dashtho, bogu kishtzorho, dar biyobonhoi suzonu qullai kuhhoi osmonbus, dar botloqu obanborho, khulosa, dar tamomi rui Zamin pahn shudaand. Nisbati digar guruhhoi rastaniho (az jihati paydoishashon) pushidatukhmon khele javon meboshand. …

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Tasiri faoliyati khojagidorii inson ba olami rastaniho

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Dar davomi sadho million sol ba olami nabotot tanho tasiri omilhoi tabii: rushnoi, harorat, nami, tasiri tarafayni (mutaqobilai) nabototu hayvonot vujud doshtu bas. Bo paydo shudani insoni boaql va faoliyati gunogunjabhai on tasirrasonii u ba tabiati atrof quvvat girift. Az zamonhoi qadim injonib inson hamesha baroi qone gardondani talabotu ehtiyoji …

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Sokht va faoliyati hayotii bakteriyaho

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Avvalho bakteriya va zanburughoro ba olami nabotot dokhil karda budand. Vale khususiyathoi farqkunandai in guruhi organizmho (sokht, shakl va jabhahoi faoliyati hayotiashon)-ro ba nazar girifta, aknun onhoro hamchun olami mustaqili organizmhoi zinda meomuzand. Bakteriyaho organizmhoi khurdi mikroskopii yakhujayragi meboshand. Dar bakteriyaho resha, poya, barg va digar uzvho dida nameshavand. Onhoro …

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