Horseshoe crabs have lived in the earth's oceans for ____ years.
A) about 4 thousand
B) close to 400 thousand
C) less than 40 million
D) over 400 million
E) over 4 billion

Question

​Horseshoe crabs have lived in the earth's oceans for ____ years.
A) ​about 4 thousand
B) ​close to 400 thousand
C) ​less than 40 million
D) ​over 400 million
E) ​over 4 billion

Quizplus · Accepted Answer

Horseshoe crabs have lived in the earth's oceans for over 400 million years, making them one of the oldest living species that have remained relatively unchanged throughout their existence.

​Horseshoe Crabs Have Lived in the Earth's Oceans for ____

Horseshoe Crabs Have Lived in the Earth's Oceans for ____