characteristics of animals
____________ is a mathematical term. it the property of an object that means that that is can be divided by one or more imaginary lines into mirror-image halves
symmetry
______ are animals with no symmetry
sponges
________ are vertebrates that have internal skeletons
endoskeletons
noochord
All ____ have stinging cells called cnidocytes, which they use to capture food.
cnidarians
_____________ are ectothermic vertebrates that usually live in water when young but can live on land as adults
amphibians
Such animals are called _________ are with a backbone
vertebrates
Sea stars, sea urchins and sea cucumbers are ______
echinoderms
The mammals with which you are most familiar with are the __________ ____________
placental mammals
Animals without a backbone are called a ________
invertebrates
__________ in phylum mollusca include three major groups.
mollusks
____________ are the third group of mammals. they do not develop true placentas like most animals do
marsupials
Animals that can regulate their inner temp. are _____
endotherms
Along with the shelled mollusks, arthropods also have an ________, a support structure on the outside of the animals body
exoskeleton