Responding to the Environment

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by joyisuful
Last updated 7 years ago

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Environmental Studies

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Responding to the Environment

An external stimulus is a stimulus from outside the body. (catching a basketball)An internal stimulus is a stimulus from inside the body. (eating, drinking)

I am a ptarmigan. I have an inherited trait that makes my color change to blend in with my environment. This improves my chances for survival.

Responding to the Environment

Sharks have eyes that see well in dim light. Their nostrils are excellent at sensing the smell of blood in the water and they have structures on their snout that pick up weak electrical signals given off by muscle contractions of other organisms.

VocabularyStimulus: a change in the environment of an organism that causes a response.Response: a reaction of an organism to a change in the environment.Physiological Adaptation: Adaptation that involves a body part's job of conrolling a life process.

Snakes use their tongues and special organs in the roof of their mouth to pick up the body scent of animals. Some snakes have heat receptors along the upper margins of the lips. Others have a pair of organs at the front of the head that allow the snake to detect heat from its prey.

Flies taste with hairs around thier mouths and with their feet. They also have sensors for touch and temperature on their legs. Their eyes don't form clear images but they can detect movement.

Male Moths use sensory hairs on their feathery antennae to detect chemicals produced by female moths.

I am a squid. My large eye find prey and avoid danger in dark ocean waters. I can judge distance accurately.


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