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ID number:720965
 
Evaluation:
Published: 02.05.2008.
Language: Latvian
Level: Secondary school
Literature: n/a
References: Not used
Extract

Gliemji ir visā pasaulē plaši izplatīti organismi. Tie ir sastopami gan uz sauszemes gan ūdenī. Latvijas ūdeņos ir sastopamas 66 gliemju sugas no kurām 59 apdzīvo upes vai ezerus bet 7 dzīvo jūrās. ūdens gliemjus iedala 2 kasēs gliemenēs un gliemežos.šīs klases atšķiras pēc čalu veidojuma, gliemenes ķermeni apņem 2 simetriskas čaulas, bet gliemežu čaula ir viengabalaina. gliemjus par barību izmanto zivis ūdeles un ūdri. Gliemjus izmanto ari kā bioloģiskos indikatorus jo gliemji dzīvo tikai tīros ūdeņos. …

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