Classification

Ursus horribilis, the scientific name for the grizzly bear, refers to the bear's

• genus and phylum

• kingdom and species

• genus and species

• kingdom and phylum

Answer explanation

The scientific name of an organism is always its genus and species names. Example: Homo sapiens. Homo is the genus. Sapiens is the species.

The chart shows observations made of an unknown organism.  Based on this information, the organism most likely belongs to the kingdom-

• Plantae

• Eubacteria

• Fungi

• Animalia

Answer explanation

Since the organism is multicellular, it cannot be eubacteria. It is a decomposer, so it can't be a plant or animal. Fungi are decomposers with a cell wall made of chitin.

Organisms are grouped into a six-kingdom classification system based on their structure and 

• evolutionary relationships

• food preferences

• habitat

• social behavior

Students research unicellular, prokaryotic organisms that live in harsh environments such as volcanic hot springs, brine pools, and anaerobic black organic mud.  Which of these groups are the students most likely researching?

• Protista

• Archaebacteria

• Eubacteria

• Plantae

Answer explanation

Archaebacteria are extremophiles, meaning they live in extreme or harsh environments.

According to this fossil record chart, trilobites probably lived in what ancient environment?

• shallow seas

• mountain tops

• freshwater lakes

• terrestrial forests

Based on the classification scheme, the European otter and the leopard are in the same

• kingdom but in different orders

• genus but in different species

• order but in different families

• family but in different genera

Answer explanation

Based on the image, otters and leopards have the same kingdom, phylum, class, and order. However, they have different families, genera, and species.

Which of these would most likely result in a change to the current classification of an organism? 

• Discovering organisms with similar physical traits in the fossil record

• Linking the organism to different ancestors through DNA sequencing

• Observing organisms that occupy the same ecological niche

• Finding a related organism that was previously considered extinct

Which characteristic do most adult fungi and plants share?

• They both are producers.

• They both have cells with cell walls.

• They both reproduce through binary fission.

• They both have multiple nuclei in each cell.

Which of the following is evidence to support the idea that two different species might have a common ancestor?

• Their fossils were discovered in the same location.

• Many of their genes are the same.

• Their methods of respiration are alike.

• They use the same means of locomotion.

Fungi obtain nutrients by--

• photosynthesis

• chemosynthesis

• absorption

• ingestion