77-rasm. Insonning tabiatga salbiy ta’siri.

Inson va tabiat. Ekologik muammolar

Biotsenoz nima? Биоценоз нима?

74-rasm. Oziq zanjiri: 1-o’simlik; 2-chigirtka; 3-baqa; 4- ilon; 5-burgut; 6-chirituvchi bakteriya va zamburug’lar.

Ekologik omillar. Organizm va tashqi muhit. Biotsenoz

Qo‘rqinch bir jasorat (Mehrobdan chayon)

Xayr endi, Ra’no! (Mehrobdan chayon)

Barimta (Mehrobdan chayon)

Ikki xil sadoqat (Mehrobdan chayon)

Chayonning namoyishi (Mehrobdan chayon)

Maxdumning baxti (Mehrobdan chayon)

Chin o‘rtoq (Mehrobdan chayon)

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