Classification of Organisms Review

Prior to the 1600's, what was the classification system that was used to group organisms?

• plants or animals

• plants, animals, fungi, protists, or bacteria

Linnaeus developed an early version of classifying living things by categorizing the organisms as plants or animals. Why is the method of classification not appropriate for Today's understanding of biodiversity? (DOK 1)

• The world has millions of different plants and animals

• The model does not account for species that are neither plant nor animal

What is the BEST question a scientist should answer to determine where a recently discovered unicellular organisms should be classified?

• What existing organism looks similar to the recently discovered organism?

• Does the organism have traits that match the traits of other organisms in other kingdoms?

The diagram below shows two single-celled organisms.

• Protists, since they are unicellular with a nucleus.

• Fungi, since they lack a cell wall and nucleus.

Which statement gives a correct justification and procedure for creating a new kingdom?

• A scientist creates a new kingdom based on the fact that a discovered organism has characteristics and DNA different from any existing kingdom without the research being supported by other members of the scientific community.

• A scientist creates a new kingdom based on the fact that a discovered organism has characteristics and DNA different from any existing kingdom and this research is supported by other members of the scientific community.

What can you find by working through the statements in a dichotomous key?

• How many species of organisms are birds?

• The identity of an organism.

A student wants to know if a Kangaroo rat (Dipodomys compactus) and a Kangaroo (Macropus oshpranter) have the same genus. Based on the provided names, what can the student conclude about how the two organisms?

• Both species' first portion in their scientific name is different, so they are from different genus groups.

• Both species’ second portion in their scientific name is different, so They are from different genus groups.

A student found an organism outside the classroom and thinks it may be a newt. The science teacher provides the student with a dichotomous key to help identify what type of organisms the student found. What characteristics must be observed for the student to use this classification model to conclude that the organism is a newt?

• The animal does have both external gills and no coastal grooves along the side

• The animal does have external gills, but has coastal grooves along the side

A 7th grade student is creating a dichotomous key for their science class to identify the two organisms shown below. Which of the answer choices below is the next logical question for Step 4 in making this Dichotomous Key?

Based on the organisms' names, what can be concluded about the relation of each species to one another?

• Both organisms do not have the same scientific name meaning they are members of the same genus.

• Both organisms have the same genus in their scientific name meaning they are members of the same family and order.