Gdz Biologiia 7 Sumatokhin Klass Dvukhstvorchatye Molliuski May 2026

: Some species (pearl oysters) produce pearls and mother-of-pearl (nacre) used in jewelry.

: They are filter feeders . Water enters through an inhalant siphon, passes over the gills where food particles are trapped, and exits through an exhalant siphon. gdz biologiia 7 sumatokhin klass dvukhstvorchatye molliuski

: Swan mussels ( Anodonta ), thick-shelled river mussels ( Unio ), and giant clams ( Tridacna ). : Some species (pearl oysters) produce pearls and

Урок 2: Классы моллюсков - Ростелеком Лицей thick-shelled river mussels ( Unio )