The discovery of extinct glyptodont fossils and their close resemblance to present-day armadillos led Darwin to make which of the following deductions?
a) All species remain unchanged
b) Populations must grow faster than the available food supply.
c) Conditions of the day were not suitable for the glyptodonts.
d) The present-day armadillos were ancestors of the much larger glyptodonts.
e) Extinction was part of the natural "circle of life".
Answer: d) The present-day armadillos were ancestors of the much larger glyptodonts.
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