Exam 19: Systematics: Seeking Order Amid Diversity

Current research indicates that the temperate forest has the greatest biodiversity.

How do Archaea and Bacteria differ?

groups contain only some of the descendants of a common ancestor.

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

-Based on the evolutionary tree, which organism's species split earliest from other members of the clade?

-Based on the eukaryotic tree, deuterostomes are most closely related to

The virus most closely related to HIV infects monkeys.

A phylogenetic species is defined as the smallest diagnosable group that contains all the descendants of a single common ancestor.

-Based on the eukaryotic tree, diatoms are most closely related to

The number and variety of species in an area is the

An organism with a nucleus would be placed in which domain?

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

Organisms that reproduce do not meet the standard criterion of a species.

Ferns and flowering plants belong to the clade _ _.

-Based on the phylogeny figure, HIV- 1 (strain 1) is most closely related to

Monophyletic groups contain all the species that evolved from a common ancestor.

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

Who introduced the "two- part" system (genus and species) that biologists use to name organisms?

How can DNA tell you how closely related two organisms are?

Eukaryotes that are not plants, animals, or fungi are classified as .