How Biologists Classify Animals
To group things based on the features they share
What is to classify?
An animal with a backbone
What is a vertebrate?
An arm-like body part in invertebrates that is used for capturing prey
What is a tentacle?
A simple worm that is flat and thin
What is a Flatworm?
A class of arthropods that includes crabs, lobsters, crayfish and sow bugs
What is a crustacean?
A subdivision of a kingdom
What is a phylum (the plural is phyla).
What is the soft material found in vertebrate skeletons?
What is cartilage?
An invertebrate animal that includes jellyfish, corals and hydras
What is a Cnidarian?
A worm whose body is divided into sections, such as earthworms or leeches.
What is a segmented worm?
A class of arthropods that includes spiders, scorpions, mites and ticks
What is an Arachnid?
A group of living things that includes separate species
What is a genus?
One of the bones or blocks of cartilage that make up backbone
What is vertebra?
An arrangement of body parts that resembles the arrangement of spokes on a wheel
What is radical symmetry?
A body plan that consists of left and right halves that are about the same
What is bilateral symmetry?
The changes in form during development in which earlier stages do not look like the adult
Complete metamorphosis
A group of organisms that can breed with each other to produce offspring themselves
What is a species?
An egg laying vertebrate that breathes with lungs
What is a reptile?
An animal that does not have a backbone
What is an invertebrate?
A member of the largest group of invertebrates which includes insects
What are arthropods?
Changes in form during development in which earlier stages look like the adult
What is incomplete metamorphosis?
The name given to each species, consisting of its genus and its species label
What is a scientific name?
Having a body temperature that changes with the temperature of surroundings
What is cold-blooded?
These are commonly used when bathing
What is the skeleton of a dead sponge (a natural sponge)?
The process by which an arthropod sheds its external skeleton as it grows
What is molting?
The first person to classify organisms
Who was Aristotle?