Review 1 (3.5)

Why is the current system for the classification of organisms subject to change?

• New geographic locations are being discovered, leading to the identification of unique organisms.

• New organisms are being discovered, and observations of anatomical similarities lead to the identification of these organisms.

• Improved technology is being used to analyze the shapes of fossilized bone, which allows for a more precise comparison of organisms.

• Molecular evidence is being used to analyze amino acid sequences and other biochemical similarities, which allows for a more precise comparison of organisms.

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NGSS.HS-LS4-5

Which development has had the greatest impact on the understanding of evolutionary relationships?

• the ability to compare DNA

• the discovery of fossil remains

• advancements in morphological study

• comparisons of embryonic development

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NGSS.HS-LS4-1

The diagram below shows a phylogenetic tree.

In which phylum do organisms have a segmented body?

• Chordata

• Echinodermata

• Hemichordata

• Nematoda

All life stems from a common ancestor. Which evidence best supports this statement?

• anatomical structures

• fossilized algae and plants

• DNA from living organisms

• presence of bone fragments in rock layers

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NGSS.HS-LS4-1

Which evidence is most used today to classify newly discovered organisms?

• fossil records

• vestigial structures

• homologous structures

• biochemical similarities

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NGSS.MS-LS4-2

How would organisms with the older classification of Protista best be classified under the new domain taxonomic system?

• as Archaea

• as Eukaryota

• . as Eubacteria

• as Monera

Consider the scientific name for the emu, Dromaius novaehollandiae. If a new species is discovered that is closely related to the emu, which scientific name would be best for this species?

• Novae hollandiae

• Dromaius novela

• Emus secondius

• Emus novela

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NGSS.HS-LS4-1

The diagram below shows a phylogenetic representation of the evolutionary trends within the animal kingdom.

Which phyla are most closely related?

• Porifera and Annelida

• Cnidaria and Mollusca

• Echinodermata and Chordata

• Choanoflagellata and Ctenophora

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NGSS.HS-LS4-1

Which statement describes the proper procedure for identifying an organism by using a dichotomous key?

• Geographical locations of organisms are studied to determine an organism’s identity.

• Homologous structures are compared to one another to determine an organism’s identity.

• Physical characteristics are compared to behavioral patterns to determine an organism’s identity.

• Physical characteristics or behavioral patterns are matched with a description to determine an organism’s identity.

In the 1770s, Linnaeus used physical characteristics to classify organisms. In today’s age of technological advances, which is mostly used to classify organisms?

• circadian rhythm similarities

• anatomical similarities

• physical similarities

• DNA similarities

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NGSS.MS-LS4-2