Dichotomous Keys

Dichotomous Keys

Assessment

Flashcard

Science

6th - 8th Grade

Hard

Created by

Barbara White

FREE Resource

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9 questions

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1.

FLASHCARD QUESTION

Front

Classification Noun

[klas-uh-fi-kay-shun]

Back

Classification


The systematic process of grouping organisms into categories based on their shared characteristics and evolutionary relationships.

Example: This diagram shows the levels of biological classification, from the broadest category (Domain) to the most specific (Species), arranged in a hierarchy.
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2.

FLASHCARD QUESTION

Front

Taxonomy Noun

[tak-son-uh-mee]

Back

Taxonomy


The scientific branch concerned with the principles of classification, including the naming and identification of organisms.

Example: This diagram shows taxonomy, the science of classifying organisms. It uses a pyramid to show how living things are sorted from broad groups (Domain) to specific ones (Species).
Media Image

3.

FLASHCARD QUESTION

Front

Speciation Noun

[spee-see-ay-shun]

Back

Speciation


The evolutionary process by which populations evolve to become distinct, reproductively isolated biological species.

Example: This diagram shows how one ancestor finch species, through natural selection, evolves into several new species with different beak shapes adapted for different food sources.
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4.

FLASHCARD QUESTION

Front

Phylogenetic Tree Noun

[fy-loh-juh-net-ik tree]

Back

Phylogenetic Tree


A branching diagram that visually represents the evolutionary history and relationships among various biological species.

Example: This image shows how different finch species are related through evolutionary history, illustrating the concept of a phylogenetic tree.
Media Image

5.

FLASHCARD QUESTION

Front

Dichotomous Key Noun

[dy-kot-uh-muhs kee]

Back

Dichotomous Key


A tool used for identifying organisms by presenting a series of choices between two alternative characteristics.

Example: This diagram shows a dichotomous key used to identify boys in a classroom by making a series of choices between two characteristics at each step.
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6.

FLASHCARD QUESTION

Front

Dichotomous Adjective

[dy-kot-uh-muhs]

Back

Dichotomous


A term meaning 'divided into two parts,' referring to the paired, contrasting choices offered at each step.

Example: This diagram shows a dichotomous key, a tool used to identify things by repeatedly splitting a group into two based on observable characteristics.
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7.

FLASHCARD QUESTION

Front

Organism Noun

[or-guh-niz-uhm]

Back

Organism


An individual living entity, such as an animal, plant, or microorganism, that exhibits the properties of life.

Example: This image shows several groups of organisms (mushrooms) with different features, which can be identified and sorted using a dichotomous key.
Media Image

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