2. how does mass extinction affect species that survive?

a. there are no surviving species if a mass extinction occurs.

b. they will soon become extinct.

c. they combine gene pools.

d. they fill new roles in the changed environment.

D. They fill new roles in the changed environment.

Explanation:

Mass extinction is the phenomena of rapidly decrease in the abundance of species from their native land. This is typically caused by catastrophic event like nuclear explosion, tsunami, earthquakes and others. This causes a drastic environmental change.

Some members which are left may play an important role in adapting the change in the environment. They fill up their ecological niches to survive and reproduce this helps in restoring the ecosystem in the changed environment.

sound moves fastest in solids because the molecules are tightly packed and it allows sound to vibrate

correct answer: false

while planning water activities, it is very important to consider the weather, because if we do not plan and are going for a surf, then it might be that the hurricane came and drown us or may carry us to long distance from where we can not come back. there are many reasons to take information about the weather when we are planning any water activities.

hence, the correct answer would be false.