Trilobites are sea creatures that lived about 500 million years ago. Their fossils have been found in rock strata all over the world, as shown in the map above. What can you conclude from this information?

Question

A world map has 9 white stars placed on 6 continents to indicate the locations of trilobite fossils. An inset photo shows a large trilobite fossil. The fossilized organism looks like a large insect with many sets of legs. It has a shell similar to a horseshoe crab.

A.Trilobites are found in rock strata above more recent fossils

B.Much of the world was covered with water 500 million years ago

C.Trilobites were the only life forms on Earth 500 million years ago

D.The world’s climate has remained constant for 500 million years

Answer 1

Based on the information provided about trilobites and their fossil distribution, the most reasonable conclusion is:

B. Much of the world was covered with water 500 million years ago.

This conclusion can be drawn because trilobites were marine creatures, and their widespread fossil presence in rock strata across various continents indicates that a significant portion of the earth's surface was likely underwater during their time. The other options do not have sufficient evidence to support them based on the information given.