Question

1A. African lungfishes can ________ whereby they survive the dry season by burrowing into mud and secreting mucus which form a protective envelope.

1B. Ray-finned fishes with AAOR can have ________ air chambers which are dorsal outpockets above the gills, sometimes one of the gill arches may be modified into a _________ organ or an ________ organ which function like a lung.

Answer 1

1A. African lungfishes can breath ( extract oxygen from air) whereby they survive the dry season by burrowing into mud and secreting mucus which form a protective envelop.

1B. Ray-finned fishes with AAOR can have swim bladder air chambers which are dorsal out pockets above the gills, sometimes one of the gill arches may be modified into a breathing organ or an alveolar lung organ which function like a lung.