During a trip to the Galapagos Islands, which observation led Charles Darwin to suspect that organisms change over time?

A. Island finches were able to breed with mainland species.
B. Island finches resembled mainland finches, but were not the same species.
C. Island finches resembled extinct species from other islands around the world.
D. Island finches did not have beaks of the same size and shape.

Please explain your answer!

Question

During a trip to the Galapagos Islands, which observation led Charles Darwin to suspect that organisms change over time? 

A. Island finches were able to breed with mainland species. 
B. Island finches resembled mainland finches, but were not the same species. 
C. Island finches resembled extinct species from other islands around the world. 
D. Island finches did not have beaks of the same size and shape.

Please explain your answer!

anonymous · Answer

(D) He observed the finches beaks from the mainland and from the islands. He realized that finches were all the same species, however they adapted in their own special way.