Modern Classification

Taxonomy is the science of describing, classifying, and naming living things. Which classification includes all protists, fungi, plants, and animals?

• Phylum Chordata

• Class Mammalia

• Domain Eukarya

• Order Carnivora

The three domains, Bacteria, Archaea, and Eukarya, represent very different forms of life. Domain Bacteria is made up of prokaryotes. Domain Eukarya is made up of eukaryotes. Which of the following statements correctly describes forms of life found in Domain Eukarya?

• The organisms are single or mulitcellular and have complex cell structures.

• These one-celled organisms live in harsh environments, such as the deep ocean and hot springs.

• The organisms have cell walls, reproduce by cell division, and live and on the human body.

• These unicellular organisms lack a nucleus in their cells and are found in almost any environment.

Tags

NGSS.MS-LS4-2

Some living things are able to tolerate life in hot springs. To which of the following domains would these organisms most likely belong?

• Archaea

• Protista

• Eukarya

• Bacteria

Tags

NGSS.MS-LS4-4

The most important difference between classification during the time of Linnaeus and current classification is that organisms are now grouped according to their

• fossil relationships.

• size relationships.

• ecological relationships.

• evolutionary relationships.

Tags

NGSS.MS-LS4-2

A diagram that shows evolutionary relationships among species is called a

• cladogram

• derived characters

• monophyletic

• phylogeny

A clade contains

• all organisms with similar appearances.

• organisms living within the same ecosystem.

• an ancestral species and all the organisms that came before it.

• an ancestral species and all its descendants.

If two species have similar DNA sequences but different observable characteristics,

• they are not closely related.

• scientists need to re-examine the DNA evidence.

• the species are more closely related than their appearances imply.

• they could not have shared a recent common ancestor.

Tags

NGSS.MS-LS4-2

NGSS.MS-LS4-3

A single common ancestor and all of its descendants is considered a...

• phylogenetic group

• monophyletic group

• taxon

• clade

A group of species of species that includes a single common ancestor and all of descendants

• clade

• taxa

• monophyletic group

• phylogenetic group

Tags

NGSS.HS-LS4-1

The goal of modern classification is to....

• understand the relationships among certain living organisms

• understand the relationships among all living things on Earth

• understand the similarities and differences of organisms

• understanding the similarities of biogeographical habitats

Tags

NGSS.MS-LS4-1

NGSS.MS-LS4-3