body
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hydrostatic skeleton
during metamorphosis, a tadpole reabsorbs its tails and gills and develops
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limbs and lungs
what are the two groups of eumetazons, based on differences on body symmetry
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bilateria and radiata
in majority of mammals, the embryo develops
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internally
the three classes of aminnotes are
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birds, reptiles, mammals
Class Actinopterygii
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ray-finned fishes
in which each cell produced by early cleavage retains the ability to develop into a
complete embryo.
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, indeterminate cleavage
thoracic breathing
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breathing involving expansion and contraction of the ribcage
ovoviparity
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a process by which fertilized eggs are retained within the female; the
embryo obtains its nourishment from the egg's yolk, and the young are fully
developed when they are hatched
vertebrae endoskeleton is made up of
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cartilage or bone
which of the following are characteristics of subphylum chelicerata
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