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
Three of the color variants found at Fossil Rim Wildlife Center in Texas
Triassic Period
Anatomy of the Large Intestine By the time chyme reaches the large intestine, most of its nutrients
The Vast World Ocean
Embryonic Period
A clock is showing the time as exactly 3:00 p.m. and 25 s.