Notochord develops into individual 1)____________. 3 classes of fishes: no limbs

Question

Notochord develops into individual 1)____________.
3 classes of fishes: no limbs, entirely aquatic, gills for respiration, 2 chamber heart.
Lampray = class2) ______________
Cartilaginous fishes = class 3)________________; 2 subclasses = 4)____________________ (chimaeras, which get their name because they posses features of cartilaginous fishes, as well as a gill cover, called the 5)______, found in bony fishes)
6)________(sharks, skates and rays)
Bony fishes = class&)_________, 2 subclasses = ray-finned fishes= 8)__________________
Vast majority of extant bony fishes
Lobe finned fishes = 9) ____________ (8 species)
Fins give rise to 4 limbs of 10)____________
Gas (swim) bladder give rise to 11)______________

12)____________: joined limbs, sound-producing larynx, eyelids, 3 chamber heart

first 4 limbed animals not fully terrestrially adapted:must stay near13)________ to avoid dessication of their thin moist 14)___________ (significant amount of 15)_____________ occurs across this) and to keep embryos during development
16)_______________: 1st group that is fully terrestrial
List their adaptations for terrestrial life (that prevent dessication)17)______________________________________________________________________________________________________________________
Birds are reptiles (Specifically they are members of the 18)___________ group)
List adaptation in birds for flight 19)_______________
20) __________: fully dry land adapted, some groups have returned to the water(dolphins), large brains, extensive parental care, 3 groups:
21)__________= most primitive (echidna, platypus):oviparous
22)___________ = pouched kangaroo
23)___________ = extended internal development of offspring, temporary organ (24)_____________) allows maternal-fetal blood sharing

Explanation / Answer

1) vertebral bodies 2) Cephalaspidomorphi 3) Chondrichthyes 4) 5) operculum

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