Exam 3: The Diversity of Life

A cluster of species that share a common ancestry is called a

A phylogenticphylogenetic diagram shows that the derived traits shared ONLY by reptiles, therapsids, and mammals are

__________ release enzymes to break down food materials in the external environment and then absorb the food into their cells.

_________ absorb most of their food from dead organisms.

Some of the Archaea are notable for

Biomarkers are __________, which provide key information about the former presence of ancient life.

__________ are protists that possess a single flagellum.

In the phylogeny of birds, __________ are intermediate between reptiles and birds.

Select the domain of life that is one of the two groups of prokaryotes.

An example of a living monotreme mammal is a(n)

Fishes with fins supported by thin bones that radiate outward from the body are called

The modern "sand dollar" that lives along sandy beaches is part of the echinoderm group called

A three-dimensional, negative imprint of a fossil organic structure is called

Unicellular algae that secrete two-part skeletons of opal, a form of silicon dioxide, are called

The classification of superfamily is the next step below __________ in the major tazonomictaxonomic categories of the higher taxa.

Jellyfishes, corals, and their relatives represent the group known as

The genus that includes all the living members of the horse family is

Most species of animals on Earth are in the taxonomic group called

A fossil is defined as

Today, this small group of bivalves includes the living genus Lingula, but during the Paleozoic Era, this group was very common in the world's oceans.