Verified Answer :

Here are a few examples:

1. Thick Fur:
- Helpful in Cold Environments: Thick fur helps animals like polar bears and arctic foxes stay warm in freezing temperatures.
- Harmful in Hot Environments: The same thick fur would cause overheating and discomfort in hot climates, making it difficult for these animals to survive.

2. Webbed Feet:
- Helpful in Aquatic Environments: Ducks and other waterfowl have webbed feet that aid in swimming.
- Harmful in Terrestrial Environments: On land, webbed feet can make walking cumbersome and slow, making it harder for these animals to escape predators or hunt effectively.

3. Camouflage:
- Helpful in Specific Habitats: Animals like the chameleon or the snowshoe hare can blend into their environments to avoid predators.
- Harmful in Different Habitats: If these animals are in environments where their camouflage doesn't match (e.g., a snowshoe hare in a non-snowy environment), they become more visible to predators.

4. Fat Storage:
- Helpful in Environments with Scarce Food: Animals like camels store fat in their humps, which provides energy during long periods without food.
- Harmful in Food-Abundant Environments: In environments where food is abundant, excess fat can lead to health issues and reduced mobility.

5. Specialized Diet:
- Helpful in Certain Ecosystems: Koalas, for example, are adapted to eat eucalyptus leaves, which few other animals can digest.
- Harmful in Different Ecosystems: If koalas are placed in an environment without eucalyptus trees, they would struggle to find food and could starve.

6. Large Ears:
- Helpful in Hot Environments: Elephants have large ears that help dissipate heat and keep them cool.
- Harmful in Cold Environments: Large ears would lose too much heat in cold climates, making it hard for these animals to maintain their body temperature.