Question

which species is mentioned as being classified as threatened due to habitat loss?

• 5 points

○ bald eagle
○ lake erie water snake
○ polar bear
○ gray wolf

what can happen when a habitat is divided? *
5 points
○ biodiversity always increases
○ species recovery becomes easier
○ biodiversity can be reduced
○ large animals require less hunting territory

what is an \introduced species\? *
5 points
○ a species that evolves naturally in a new ecosystem
○ a species that moves into an ecosystem as a result of human actions
○ a species that was previously extinct but has been revived
○ a species that has adapted to climate change

Explanation:

1. For the first question: Polar bears are threatened primarily due to the loss of their Arctic sea ice habitat caused by climate change. Bald eagles recovered from pesticide issues, Lake Erie water snakes faced persecution, and gray wolves faced hunting and habitat fragmentation but polar bears are specifically cited for habitat loss as a key threat.
2. For the second question: Habitat division (fragmentation) isolates populations, limits gene flow, and reduces available resources, which can lead to a decrease in biodiversity. The other options are incorrect as biodiversity does not increase, species recovery is harder, and large animals still need their full hunting territory.
3. For the third question: An introduced species, also called an exotic species, is one that is moved into a new ecosystem by human activities, either intentionally or accidentally. The other options describe natural evolution, de-extinction, and climate adaptation, which are not the definition of an introduced species.

Answer:

1. Polar bear
2. Biodiversity can be reduced
3. A species that moves into an ecosystem as a result of human actions