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Less oxygen triggers grasshopper molting, farmers could benefit

Less oxygen = shorter time between molts = shorter life-span = fewer hungry grasshoppers. And for farmers, that's very good news. A recent study conducted by Scott Kirkton, associate professor of biology ...

Biology - Ecology

May 14, 2013

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Exoskeleton

An exoskeleton is the external skeleton that supports and protects an animal's body, in contrast to the internal skeleton (endoskeleton) of, for example, a human. In popular usage, some of the larger kinds of exoskeletons are known as "shells". Examples of exoskeleton animals include insects such as grasshoppers and cockroaches, and crustaceans such as crabs and lobsters. The shells of the various groups of shelled mollusks, including those of snails, clams, tusk shells, chitons and nautilus, are also exoskeletons.

Mineralized exoskeletons first appeared in the fossil record about 550 million years ago, and their evolution is considered by some to have played a role in the subsequent Cambrian explosion of animals.[citation needed]

Some animals, such as the tortoise, have both an endoskeleton and an exoskeleton.

This text uses material from Wikipedia, licensed under CC BY-SA

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