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following articles are provided by World Book. |
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| Lizard |
| Lizards
are reptiles and are closely related to snakes. Lizards
vary in size, shape, and color. They have many different
ways of moving about and of defending themselves. Scientists
have identified almost 3,800 different species of lizards.
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| Vertebrate |
| Vertebrate
(VUR tuh briht) or (VUR tuh brayt), is an animal with
a spinal column (backbone) and a cranium (brain case).
There are about 40,000 species of vertebrates.
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Article |
| Invertebrate |
| Invertebrate
(ihn VUR tuh briht), is an animal that lacks a vertebral
column (backbone). The bones of the vertebral column are
called vertebrae. There are more than 1 million known
species (kinds) of invertebrates and about 40,000 species
of vertebrates. |
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Article |
| Skeleton |
| Skeleton
is the flexible, bony framework of any vertebrate animal.
It gives the body shape, protects vital organs, and provides
a system of levers, operated by muscles, that enables
the body to move. |
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Article |
| Crab |
| Crab
is a type of animal with a hard shell and jointed legs.
Some crabs live in shallow waters along seashores, and
some are found in deeper waters. Others live in burrows
on sandy beaches or muddy shores. Only a few species of
crabs live in fresh water or on land. |
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Article |
| Lion |
| Lion
is a big, powerful cat. It is probably the most famous
member of the cat family. People are frightened by the
lion's thundering roar and impressed by its strength and
royal appearance. The lion is called the "king of
beasts," and is a well-known symbol of both beauty
and power. |
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Article |
| Snake |
| Snake
is an animal with a long, legless body covered by dry
scales. To move about on land, a snake usually slides
on its belly. |
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Article |
| Sea
urchin |
| Sea
urchin is a sea animal related to the starfish and the
sand dollar. Sea urchins have ball-shaped bodies covered
with long, movable spines. Sea urchins may be black, brown,
green, purple, red, or white. They measure from 2 to 5
inches (5 to 12 centimeters) in diameter. They live in
oceans all over the world. |
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Article |
| Beetle |
| Beetle
is one of the most common of all insects. There are about
300,000 species (kinds) of beetles. They live everywhere
on earth except in the oceans. |
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Article |
| Owl |
| Owl
is a type of bird that usually lives alone and hunts for
food at night. The owl has been called the "night
watchman of our gardens" because it eats harmful
rodents at night. |
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Article |
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