Which evidence suggests that several mass extinctions have occurred during earth's history? a. fossils provide information about water level and temperature. b. many fossils demonstrate that organisms have changed over time. c. fossils of the same species have been found on distant continents. d. many fossils of organisms that are no longer living have been discovered.

The only option that explain what is being asked is the last option because we can date the time of fossils, and when the newest fossils all appear on the same time frame, that is an indication of a mass extinction.

D) Many fossils of organisms that are no longer living have been discovered.

Hope it helped,

BioTeacher101

The Correct Answer is D

Many fossils of organisms that are no longer living have been discovered.

Explanation:

during the process of dna replication, brdu can replace thymidine and incorporate into the newly synthesized dna, cell proliferation thus can be reflected in the extent of brdu incorporation.

answer:

convection currents in the magma drive plate tectonics. heat generated from the radioactive decay of elements deep in the interior of the earth creates magma (molten rock) in the aesthenosphere. the aesthenosphere (70 ~ 250 km) is part of the mantle, the middle sphere of the earth that extends to 2900 km.