Science Studies

Download e-book for iPad: Animal Defenses (Animal Behavior) by Christina Wilsdon

By Christina Wilsdon

Animal Defenses (Animal habit)

Show description

Read or Download Animal Defenses (Animal Behavior) PDF

Best science studies books

Read e-book online Darwin and Evolution for Kids: His Life and Ideas with 21 PDF

Darwin and Evolution for children lines the transformation of a privileged and a bit of scatterbrained early life into the nice philosopher who proposed the progressive conception of evolution. via 21 hands-on actions, younger scientists find out about Darwin’s lifestyles and paintings and examine present proof of evolution.

Read e-book online Heroes of the Environment: True Stories of People Who Are PDF

This inspiring e-book provides the real tales of 12 humans from throughout North the United States who've performed good stuff for the surroundings. Heroes contain a teenage woman who discovered easy methods to get rid of an business pollutant from the Ohio River, a Mexican celebrity wrestler who works to guard turtles and whales, and a teenage boy from Rhode Island who helped his group and his nation boost powerful e-waste recycling courses.

Download e-book for iPad: Green Thumbs. A Kid's Activity Guide to Indoor and Outdoor by Laurie Carlson

Budding gardeners will study what it takes to make issues develop with enjoyable actions that require simply on hand fabrics.

Extra info for Animal Defenses (Animal Behavior)

Sample text

Shells A sturdy shell is the primary defense for a variety of very slowmoving animals, such as turtles, tortoises, snails, and clams. Turtles and tortoises are reptiles with bodies enclosed in shells. Turtles spend much or all of their lives in water, while tortoises live on land. Both have shells made of two parts: an upper section called the carapace and a lower section called the plastron. The shell is basically a sturdy box made of bone. The inside of the carapace is made of bones fused together.

If a predator grabs the centipede’s hind end because it mistakes it for the head, the centipede can twist around and bite it. The shingleback skink, a lizard of Australia, also uses this tactic. Its stumpy head and tail look nearly identical. A predator that grabs the wrong “head” will be surprised to see the skink scurry off in the opposite direction. Many snakes also use the two-headed trick. They roll up in a ball and hide their heads in their coils when under attack. Then they wave their tails to threaten the predator and deflect its attack.

These bones include the turtle’s spine and ribs. The plastron is made of bone, too. In most species, the outside of the carapace is covered with plates made of a tough material called keratin—the same substance that forms hooves and fingernails. These plates are called scutes. Some turtles have just a few scutes embedded in a thick skin on the carapace. Some have none at all. Many turtles can pull their heads, tails, and legs partly or fully into their shells. Box turtles have hinged plastrons, so they can close the openings in their shells.

Download PDF sample

Animal Defenses (Animal Behavior) by Christina Wilsdon

by Kenneth

Rated 4.38 of 5 – based on 36 votes