Dichotomous Key

Definition: A tool used to identify organisms based on a series of yes/no questions.

How does a dichotomous key help classify organisms?

• A) It lists all known species.

• B) It helps identify organisms by answering a series of questions about their characteristics.

• C) It shows how organisms are related to each other.

• D) It groups organisms by their environment.

Taxonomy

Definition: The science of classifying organisms into groups based on shared characteristics.

What is the purpose of taxonomy in biology?

• A) To group organisms based on their diet.

• B) To categorize organisms into a system based on similarities and differences.

• C) To study the environment where organisms live.

• D) To measure the size of organisms.

Kingdom

Definition: The highest level of classification in the biological classification system, which includes all living organisms.

Which group contains the most types of organisms?

• A) Family

• B) Kingdom

• C) Phylum

• D) Genus

Phylum

Definition: A group of organisms that share major body plans or structures.

What do organisms in the same phylum share?

• They have the same habitat.

• They share similar body structures and features.

• They all produce offspring in the same way.

• They all belong to the same kingdom.

 Class

Definition: A classification level below phylum that groups organisms with similar characteristics.

Which classification level comes immediately after phylum in the biological classification system?

• Kingdom

• Class

• Family

• Genus

Order

Definition: A group of related families that share specific traits.

In the biological classification system, what comes after class?

• Order

• Kingdom

• Family

• Genus

Family

Definition: A classification level that includes related genera (plural of genus).

What does a family in biological classification represent?

• Organisms that share the same environment.

• Organisms with similar diets.

• A group of related genera.

• A group of unrelated species.

Genus

Definition: A group of closely related species that share common characteristics.

What do organisms in the same genus have in common?

• They are in the same class.

• They are closely related and share common traits.

• They live in the same environment.

• They all belong to the same family.

Species

Definition: The most specific level of classification, consisting of organisms that can interbreed and produce fertile offspring.

What defines organisms as belonging to the same species?

• They look the same.

• They can interbreed and produce fertile offspring.

• They live in the same area.

• They share the same genetic material.

Binomial Nomenclature

Definition: The system of giving each species a two-part scientific name, using its genus and species.

How does binomial nomenclature help scientists classify organisms?

• It groups organisms based on their diet.

• It assigns a unique two-part name to every organism based on its genus and species.

• It tells scientists the size of the organisms.

• It gives every organism a number for identification.