Exam 23: Paleobiology and Macroevolution

Dinosaurs flourished during the ____ era.

In some amphibians, including salamanders, paedomorphosis results from mutations that ____.

Throughout Earth's history, changes in climate patterns that led to declining sea levels took an especially severe toll on organisms living in ____ environments.

The narrower and more tubular shape of Delphinium nudicaule flowers, which mature at an earlier stage of development than Delphinium decorum flowers, is the product of ____.

Using the geological time scale, scientists can determine the absolute age of rocks and fossils.

The first dinosaur fossils were discovered in ____, leading to the first public dinosaur craze.

A single seed lands on one of a group of isolated islands. Several million years later, its descendants have evolved into a number of new species on the different islands, representing a variety of trees, shrubs, and vines. This is an example of ____.