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Vertebrates (pg. 66-68)

Some words may be used more than once in the puzzle!

Crossword hints:
cold-blooded animals that live in water and on land, Fish, reptiles, and ____ are cold-blooded animals., mammal that gives birth to its young that develops inside the mother, cold-blooded animals that have scaly, waterproof skin and lungs, Lizards, turtles, snakes, and alligators are all examples of ___., Monotremes, marsupials, and placental animals are all examples of ____., Skates, rays, and ___ are examples of cartilaginous fish because they have catilage instead of bones., A chicken is a monotreme because it can lay eggs., Fish breathe through ____., Toads, ____, and salamanders are examples of amphibians., True or False. A frog is born with gills that change to lungs later in life., Mammals make heat for their bodies by burning ___., a mammal that lays eggs, Opossum, ______, and koala bears are all examples of marsupials., A frog begins life as a _____., Reptiles breathe through ____., Animals that have a constant, steady ody temperature are ____-blooded., Key characyeristics of mammals are ____, hair/fur, and large brains., a pouched mammal, animals with hollow bones, 2 legs, and feathers, Animals that do not have a steady body temperature are ___-blooded animals., The three classes of fish are bony, cartilaginous, and ____., True or False. Reptiles can be cold-blooded and warm-blooded animals.,

Crossword words:
LUNGS, TADPOLE, JAWLESS, MONOTREME, AMPHIBIANS, AMPHIBIANS, GILLS, FROGS, REPTILES, TRUE, MILK, MAMMALS, REPTILES, FOOD, WARM, SHARKS, FALSE, KANGAROO, BIRDS, MARSUPIAL, FALSE, PLACENTAL,