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THE SLIPPER-SHAPED _____ USES ITS FIBERS TO MOVE FROM PLACE TO PLACE AND TO DIRECT FOOD PARTICLES.
PARAMECIUM
THE WORD CENTIPEDE MEANS "ONE _____ LEGS"
HUNDRED
COLD-BLOODED VERTEBRATES CANNONT MAINTAIN A _____ BODY TEMPERATURE.
CONSTANT
THE TWO PARTS OF A VERTEBRATE'S TRUNK ARE THE _____ AND THE ABDOMEN.
THORAX
BIRDS AND MAMMALS ARE TWO COMPLEX GROUPS OF WARM-BLOODED _____
VERTEBRATES
_____ INVERTEBRATES HAVE COMPLEX BODY SYSTEMS BUT LACK TRUE BACKBONES.
COMPLEX
THE CATEGORY OF INVERTEBRATES IS DIVIDED INTO SEVERAL SMALLER GROUPS ON THE BASIS OF BODY _____
STRUCTURE
MOST REPTILES WITH FEET HAVE _____ ON THEIR FEET
CLAWS
BASS AND PERCH ARE _____ FISH.
BONY
A _____ SENSES OF HEARING, SIGHT, AND SMELL ARE KEEN.
CARNIVORE'S
BY EATING ORGANIC MATTER IN THE SOIL, DIGESTING IT, AND LEAVING BEHIND WASTE MATERIALS THAT ENRICH THE SOIL, ____ HELP THE SOIL.
EARTHWORMS
_____ ARE COMMON HATCHET-FOOT MOLLUSKS
CLAMS AND OYSTERS
THE SKELETON OF EACH VERTEBRATE HAS A LONG COLUMN OF BONE SEGMENTS ALONG ITS BACK CALLED THE _____, OR SPINAL COLUMN.
BACKBONE
_____ ARE LARGE REPTILES WITH WIDE, ROUND NOSES.
ALLIGATORS
ALL BIRDS REPRODUCE BY MEANS OF HARD-SHELLED _____
EGGS
ANIMALS ARE OFTEN DIVEDED INTO TWO MAIN CATEGORIES DEPENDING ON WHETHER OR NOT THEY POSSESS A _____
BACKBONE
_____ MAKE UP MORE THAN HALF THE KNOWNKINDS OF INVERTEBRATES.
INSECTS
_____ ARE PROBABLY THE MOST COMMON OF THE AMPHIBIANS.
FROGS
IN AN UNCONDITIONED _____ ACTION, THE ANIMAL'S RESPONSE IS THE SAME EVERYT IME THE STIMULUS IS THE SAME.
REFLEX
_____ MAKE SOUNDS THAT BOUNCE OFF OBJECTS IN THEIR PATHS TO DISTINGUISH HOW FAR AWAY AN OBJECT IS.
BATS
_____ WERE ONCE THE HOME OF MOLLUSKS
SEASHELLS
_____ AND CORAL HAVE TWO CELL LAYERS SEPARATED BY A JELLYLIKE SUBSTANCE.
JELLYFISH
BOTH SNAKES AND LIZARDS HAVE AN UNUSUAL SENSE ORGEN IN THEIR MOUTHS CALLED THE _____ ORGAN, WHICH IS USED TO SMELL THEIR SURROUNDINGS.
TOADS ARE THE MOST LAND-DWELLING OF ALL _____.
AMPHIBIANS
FEATHERS MUST BE OIL-COATED TO KEEP THEM DRY AND _____
BUOYANT