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ID number:325654
 
Author:
Evaluation:
Published: 03.06.2008.
Language: Latvian
Level: Elementary school
Literature: n/a
References: Not used
Extract

“Vaskulārie augi,sporaugi bez vadaudiem”
Sporaugi bez vadaudiem –Sūnas.
NAV vadaudu.
Dominē hoploidālā dzimumpaaudze (gametofīts) un sporas izplatās ar vēju.
Aug mitrās vietās.
Sastāv no stumbra un lapām.
Nav Sakņu, bet ir pavedienveida izaugumi –rizoīdi.
Pasaulē ir aptuveni 27 000 sūnu sugu.(Latvijā -485 sugas, 203ir ierakstītas aizsargājamo sugu sarakstā.
Maksimālais sūnu garums ir 30 cm.
Sūnu nodalījumam ir aknu un lapu sunu klase.…

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