KORDAMINE Kalad 1 1. Mis ülesanne on soomustel? .......................................................................................................................................................... 2. Mitu vereringet on kaladel? .......................................................................................................................................................... 3. Kuidas mõjutab välistemperatuur kala kehatemperatuuri? .......................................................................................................................................................... .......................................................................................................................................................... 4. Miks kala kuival maal sureb? .......................................................................................................................................................... .......................................................................................................................................................... 5. Mille abil saab kala püsida vees liikumatult ilma ujumata? .......................................................................................................................................................... 6. Mis on poised? ......................................................................................................................................................... 7. Nimeta kalade meeleelund, mis teistel selgroogsetel puudub. Milleks on see vajalik? ........................................................................................................................................................ ........................................................................................................................................................ 8. Kas kaladel on rohkem arenenud nägemis- või haistmiselundid? ........................................................................................................................................................ 9. Kuidas kalad suhtlevad? ........................................................................................................................................................ ........................................................................................................................................................ 10. Mida nimetatakse kudemiseks? ....................................................................................................................................................... ....................................................................................................................................................... |