Exam 19: Systematics: Seeking Order Amid Diversity

___________evolution results in similar anatomical features between unrelated organisms that may be misleading in determining species relationships.

___________groups are groups in which all members are descendants of a common ancestor.

Based on current hypotheses, the prokaryotic group that gave rise to eukaryotes is the___________.

Briefly explain why the adoption of a standard, two-part scientific naming system is helpful to biologists.

The number and variety of species in an area is the

Which of the following is the smallest or least inclusive group?

The greatest genetic diversity among humans is found between some ___________populations.

Historically, in the field of taxonomy, what characteristic was most commonly used for determining species relationships?

Evolutionary relationships among organisms are most likely to be revised at the ___________level.

All organisms that are derived from a single common ancestor make up a clade.

How did Darwinʹs evolutionary theory change the significance of the taxonomic categories of organisms?

The second of the two names in an organism?s scientific name is the___________ .

-Based on the phylogeny figure, HIV-1 (strain 1) and HIV-2 (strain 2)

Which of the following is the largest or most inclusive group?

Why are Archaea and Bacteria, which are both prokaryotes, different domains?

Systematics holds that the more similar the DNA of two organisms, the more closely related they are.

The Asian elephant has the scientific name Elephas maximus. The term Elephas is the

-According to chemical and molecular evidence, members of the kingdom Fungi are most closely related to which of these groups in the tree of life?

A major difficulty facing systematists is

Systematists use synapomorphies to build phylogenetic trees.