Planariya qaysi paytda mayda bo’laklarga bo’linib ketishi mumkin?
- jinsiy yol bilan ko’paygandan keyin
- noqulay sharoitd vujudga kelganda
- bahorda, kunlar iliy boshlaganda
- yozda, oziq moddalar yetarli bolganda
- To’g’ri javob berilmagan
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