|
Most roundworms are free-living. Most flatworms are ____.
|
aquatic
|
|
Arctic terns, caribou, monarchs, and salmon are ____ animals.
|
dorsal
|
|
Most millipedes secrete ____ substances for defense.
|
ectothermic
|
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Most reptiles, amphibians, and fish are ____ (cold-blooded).
|
feral
|
|
The ____ (top) shell of a turtle is called the carapace.
|
migratory
|
|
Domesticated animals that have returned to the wild are ____.
|
parasitic
|
|
Cobras, vipers, scorpions, and centipedes are ____ predators.
|
poisonous
|
|
Manatees, porpoises, seals, and walruses are ____ mammals.
|
venomous
|
