Multiple choice

True or false: Scientists believe most species on Earth live in the ocean.

  1. True

  2. False

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Although the ocean covers over 70% of the Earth's surface, scientists estimate that only about 15% to 20% of all species live in the ocean. The vast majority of Earth's species live on land, largely driven by the immense diversity of terrestrial insects.