Предмет: Биология, автор: аброковадарина

как преспасобляется акула

Ответы

Автор ответа: AlinkaMalinka120

В процессе эволюции у акул появились следующие приспособления:
- обтекамая торпедообразная форма тела,
- парные и непарные плавники, парные держит горизонтально, в хвостовой (вертикальный) заходит позвоночник,
- отсутствие жаберных крышек компенсруется безостановочным движением (даже во сне) , что бы нагнетать в жаберные щели воду с кислородом,
- отсутствие боковой линии. Зато мозг и инстинкты развиты лучше, чем у костных рыб,
- отсутствует воздушный пузырь, но слой жира помогает плавучести,
- яйцеживорождение.

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