Question

Darwin's opinion that living forms must be descended from extinct forms was based on ________ evidence.

Answer 1

fossil

Step-by-step explanation:

Fossils are remnants of living organisms that have been preserved as a result of natural processes such as carbonization, mineralization, etc.

Darwin studied the remains of animals when he worked as a naturalist during the expedition with HMS Beagle between 1831 and 1836. It was during this period he observed that the living forms of some animal species looked in some ways like their extinct counterparts.

He then concluded that living forms, though different in some ways from their extinct counterparts, must have descended from the extinct form with some modifications.