All species on Earth have already been discovered.

• True

• False

More than one half of the world’s species live in tropical forests.

• True

• False

Just over 10 million species have been identified by scientists.

• True

• False

Earth has more species than it needs.

• True

• False

Most species do not benefit humans.

• True

• False

All habitats have the same number of species.

• True

• False

Biodiversity includes genetic diversity, species diversity, and ecosystem diversity.

• True

• False

Biological diversity is more threatened now than at any time in the past 65 million years.

• True

• False

The loss of forests, wetlands, grasslands, and other habitats contributes to loss of biodiversity.

• True

• False

Many species become extinct without ever being identified.

• True

• False