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Organisms that are fastened in place
What do ectotherms do to raise their body temperature?
Bask in the sun
How do endotherms raise their body temperature?
Use the heat produced by their cellular respiration
What lays eggs?
Snails and slugs:
Squids, octopuses, nautiloses:
All chordates have 4 characteristic structures:
- Dorsal hollow nerve chord
- Gill slits
- Post Anal Tail
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