Flash Cards

Science Classification of organisms

Term Definition
Biodiversity & Classification Biodiversiy is the variety of life in the world or in a particular habitat or ecosystem. Classification is the division of organisms into kingdoms, groups, or classes based on specific characteristics.
Purpose of Classification Classifying answers questions such as:
-How many known species are there?
-What are the defining characteristics of each species?
-What are the relationships between these species?
Taxonomy & Founder Taxonomy is the science of naming, describing, and classifying organisms.

Carolus Linnaeus founded modern taxonomy and classified all living things based on their structure.

Seven Levels System The Seven Levels System is a classification system based on shared characteristics
Kingdom, Phylum, Class, Order, Family, Genus, Species
The more characteristics the organisms share, the more closely related they might be.
Vertebrates Vertebrates have a backbone and spinal column. They can be divided into further groups:
fish, amphibians, reptiles, birds, and mammals.
Dichotomous Key A Dichotomous Key is an aid used to identify organisms and that consists of the answers to a series of questions.
Scientific Name A scientific name is made up of the Genus and Species. The Genus name begins with a capital letter, and the Species name starts with a lowercase letter.
Animals Animals are multi-cellular, can usually move, depend on other organisms for food, and undergo sexual reproduction.
Intervertebrates Intervertebrates don't have any type of bones, including backbones, but have an exoskelton for support.
Mollusks Mollusks have a hard shell to protect soft parts of their bodies and a muscular foot for movement. Ex: clams, slugs squids, octopus
Arthropods Arthropods have exoskeletons, a segmented body, and jointed legs. Ex: lobsters, crabs, insects, and spiders

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