Extinction Practice Questions

Front

What is a mass extinction event?

Back

A mass extinction event is a period in Earth's history when a significant number of species die out in a relatively short time due to environmental changes, catastrophic events, or other factors.

Front

How many mass extinction events have occurred in Earth's history?

Back

There have been 5 mass extinction events in Earth's history.

Front

True or False: Most species that have ever lived on Earth are now extinct.

Back

True

Front

What is one likely reason a species may become extinct after a major environmental change?

Back

There are not enough members of the species born with a trait necessary to survive in the new environment.

Front

How does genetic diversity affect a species' survival during environmental changes?

Back

Higher genetic diversity increases a species' chances of survival during environmental changes because it provides a greater range of traits that may be beneficial.

Front

Which of the following is NOT a reason a species may become extinct?

Back

Reproducing is NOT a reason a species may become extinct.

Front

What is habitat loss?

Back

Habitat loss is the destruction or alteration of the natural environment where a species lives, often leading to a decline in population and potential extinction.

Front

What role does competition play in extinction?

Back

Competition for resources can lead to extinction if a species cannot compete effectively against others for food, space, or mates.

Front

What is overhunting?

Back

Overhunting is the excessive hunting of a species, leading to a significant decline in its population and potentially causing extinction.

Front

What is the significance of biodiversity in an ecosystem?

Back

Biodiversity contributes to the resilience of an ecosystem, allowing it to withstand environmental changes and support a variety of life forms.