Question

1. humans have a significant impact on the amount of biodiversity on earth. true false 9. extinctions have happened throughout history. the rate of extinctions presently for mammals, birds, and amphibians is considered normal if you compare it to past extinctions. true false 10. present day extinctions are happening at the greatest rate on islands. all of the following statements are true reasons for this except islands are isolated from humans. invasive species have been brought to islands by humans islands have smaller population sizes so they are more impacted by changes. there is less spaces on islands so species have to compete more with each other. no exceptions - all statements are true.

Explanation:

• For question 8, human activities such as deforestation, pollution, and over - hunting have reduced biodiversity, so the statement is true.
• For question 9, the current extinction rate for mammals, birds, and amphibians is much higher than the historical average due to human - related factors, so the statement is false.
• For question 10, islands are not isolated from humans as humans have introduced invasive species, and small population sizes and limited space contribute to high extinction rates. Islands are not isolated from humans, so the first option is the "except" reason.

Answer:

1. A. True
2. B. False
3. A. Islands are isolated from humans.