Characteristics used to classify animals
Invertebrates
Invertebrates/ Vertebrates
Vertebrates 1
Vertebrates 2
100

A scientist who studies animals 

zoologist 

100

A sea urchin is this kind of invertebrate 

echinoderm 

100

largest group of fish

bony fish

100

These vertebrates have beaks that lack teeth 

birds 
100

A kangaroo is this kind of mammal 

Marsupial 

200

the stinging cells that jellyfish and corals have 

cnidocytes 

200

This group of arthropods have more than six legs, with some having 10 

crustaceans 

200

This group of invertebrates can fly 

insects 

200

Characteristic unique to mammals 

hair or milk production 

200

Crocodilian with narrow, pointed snouts

crocodiles 

300

When the sense organs and brain are clustered at one end of the body 

cephalization 

300

the scientific term for the physical appearance of an animal

morphology 

300

Snails belong to this phylum 

Mollusca

300

Three subgroups of turtles 

tortoise, sea turtles, terrapins 

300

Most mammals are these type of mammals 

placental mammals 

400

jellyfish has this type of gut 

incomplete gut 

400

These animals never develop a notochord in their lifetime 

invertebrates 

400
This process allows some ectothermic vertebrates to develop from aquatic young to terrestrial adults 

metamorphosis 

400

A small group of reptiles consisting of only two species, found in New Zealand 

Tuatara

400

Another name for an egg-laying mammal

monotreme

500

Term defined as : the property of an object that can be divided by one to more imaginary lines into mirror-image halves 

symmetry 

500

What are the three major groups of mollusks 

Gastropods, cephalopods, bivalves 

500

This type of squamate have immovable eyelids 

snakes 

500

This structure, inside of the mother, brings oxygen and food to a growing fetus

placenta 

500

In mammals, milk is produce in this structure 

mammary glands 

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