Exam 18: Organic Evolution--The Theory and Its Supporting Evidence

Homologous structures probably indicate descent with modifications from a common ancestor.

Darwin cited embryology as supporting evidence for the theory of evolution.

Cladistics and cladograms work well for constructing relationships among fossil organisms.

According to the concept of ____________________, an ancestral species changes gradually and continuously and grades imperceptibly into a descent species.

Darwin and _____ presented the idea of natural selection simultaneously in 1859 to the Linnaean Society in London.

Features that serve the same purpose on very dissimilar organisms are called ____.

Genes controlling the same trait are called ____________________.

What is the order of the expanded Linnaean classification scheme?

A species is ____ isolated from other species.

In modern evolutionary theory, _____ evolve.

Linnaean classification ____.

Background extinction refers to ____.

____________________ are the only record of prehistoric life.

What term descibes populations that have similar individuals that can interbreed and produce fertile offspring?

Cell division that results in cells containing only one chromosome from each pair is referred to as ____________________.

DNA is an abbreviation for ____________________.

A clade is a group of organisms ____.

What term describes an anomaly that is similar to the reappearance of an ancestral trait?

What role does the process of extinction play in the evolution of life?

With the Linnaean classification scheme, as one moves down the hierarchy, the categories become more ____.