hich example shows an organism that cannot reach homeostasis through internal changes?
A dog shivers when it is too cold.
A lizard is cold, and it moves to a sunny rock to warm up.
A person gets a fever in response to a flu infection.
Circulation decreases in a bird when it becomes too warm
Circulation decreases in a bird when it becomes too warm
The example that shows an organism that cannot reach homeostasis through internal changes is: Circulation decreases in a bird when it becomes too warm.
To determine which example shows an organism that cannot reach homeostasis through internal changes, let's break down each scenario and assess if it's an example of achieving or not achieving homeostasis.
1. A dog shivers when it is too cold:
Shivering is a mechanism by which the dog's body generates heat through muscle contractions. By shivering, the dog is trying to maintain or increase its internal body temperature. This is an example of achieving homeostasis through internal changes.
2. A lizard is cold and moves to a sunny rock to warm up:
In this situation, the lizard recognizes that its body temperature is below the desired level. By moving to the sunny rock, it utilizes an external heat source to warm up and reach its ideal body temperature. This behavior demonstrates the ability to reach homeostasis by adapting to the external environment.
3. A person gets a fever in response to a flu infection:
Fever is a mechanism by which the body raises its internal temperature to combat infections. By increasing temperature, the body helps to fight off pathogens and return to a state of health. This example represents the organism's ability to adjust its internal conditions to achieve homeostasis.
4. Circulation decreases in a bird when it becomes too warm:
When a bird becomes too warm, its circulation decreases to prevent overheating. By reducing blood flow to the surface areas, the bird can release less heat and maintain its body temperature within an acceptable range. This example illustrates the organism's ability to adapt internally to maintain homeostasis.
Based on the explanations provided, all the examples demonstrate organisms that can reach homeostasis through internal changes. Therefore, none of the given examples show an organism that cannot achieve homeostasis through internal changes.