Question

1. what conditions are necessary for preserving dna over a long period of time?

○ volcanic ash

○ cold, frozen ground

○ abundant tree resin

1. what is a benefit of bringing animals back from extinction?

○ the animals could create tourism revenue.

○ the animals could be engineered to help people.

○ the animals could restore aspects of an ecosystem.

1. what is a risk of bringing animals back from extinction?

○ the animals could harm people.

○ the animals could adapt to climate change.

○ people could see what extinct animals were like.

Explanation:

Question 1

To preserve DNA over long periods, cold, frozen ground (like permafrost) slows decomposition and enzymatic activity that degrades DNA. Volcanic ash and tree resin are less associated with long - term DNA preservation compared to cold, frozen conditions.

Bringing extinct animals back can help restore ecosystems. For example, if a keystone species is brought back, it can re - establish food webs and nutrient cycles. Creating tourism revenue is a secondary or less - significant benefit, and engineering animals to help people is not a primary benefit of de - extinction for the natural world.

One risk of de - extinction is that the reintroduced animals could harm people. Adapting to climate change is not a risk (it would be a positive in terms of survival), and people seeing extinct animals is a potential benefit, not a risk.

Answer:

B. cold, frozen ground

Question 2