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Crucigrama Sopa de Letras Hoja de Trabajo
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Biology Review

Horizontales
Have notochord, hollow nerve cord, pharyngeal slits and tail
Development involving pupa
Filelike feeding organ
Development involving nymphs
Use metabolic heat to keep warm
Verticales
Divided along one plane
Body temps are determined by surroundings
External skeleton made of chitin
Keeps embryo from drying out
Partially envelopes fetus in female mammals