What is an index fossil?
A) An organism that existed for a vast period of time and is representative of an era
B) An organisms that is restricted to one small, geographic setting
C) A trace fossil that defines a colony of organisms
D) An organism that was geographically widespread but limited to a short span of geologic time
Question 2
________ was the English engineer and canal builder who observed that sedimentary strata in widely separated areas could be identified by their distinctive fossil assemblages.
A) Isaac Newton
B) William Smith
C) Charles Lyell
D) Charles Darwin
A fossil of the first known feathered vertebrate, Archaeopteryx, which emerged in the Jurassic perio
Model Organism Drosophila
Time Slows Down Near Matter
Gary Alvis, The Painted Hills, John Day Fossil Beds National Monument, Oregon.
Graph showing oral administration of a single-dose drug. The time of onset is 2 hours and the end of ...
Cranial polarization. Lightly place both thumbs on the anterior fontanel, with both index fingers ...