Term | Definition |
adaptation | a behavior or physical characteristic that allows an organism to survive |
fertilization | the joining of a sperm and a egg |
vertebrate | the small bones that make up the back |
invertebrate | an animal that does not have a back bone |
bilateral symmetry | body plan with two halves that are mirror images |
radial symmetry | the quality of having having many lines that pass through the central point |
larva | the immature form of a animal that looks very diffrent form the parent |
cnidarian | an invertebrate animal that uses stinging cells to capture food and portect itself |
polyp | the cnidarian body plan is characterized by a vaselike shape and that usally adapted for a life attached to an underwater surface |
medusa | the cnidarian body plan having a bowl shape and adapted for a free-swimming life |
parasite | the organism that benefits by living on or in a host |
host | the organism that a that a parasite or a virus lives in or on |
scavenger | a organism the has to go and find its own food |
closed circulatory system | a system where blood is pumped by a heart through the vessels |
mollusk | soft body invertebrate usually in a shell |
open circulatory system | a system where blood is pumped by a heart into the body cavities |
gill | a part on a fish used for obtaining oxygen |
gastropod | The largest, most diverse phylum of mollusks |
cephalopod | the phylum of mollusks with bilateral symmetry such as an octopus |
bivalve | a mollusk with two shells |
herbivore | a organism that never eats meat |
carnivore | a organism that only eats meat |
omnivore | a organism that eats both veggies and meat |
radula | tiny teeth that help obtain food |
arthrodpod | an invertebrate with an exoskeleton and a segmented body |
exoseleton | a skelton on the outside |
molting | the shedding of a out grown exoskelton |
crustacean | a large group of arthropods with and exoskeleton such as a lobster |
complete metamorphosis | is like a butter fly growing up |
gradual metamorphosis | like a grass hopper growing up |
arachnid | a class of joint-legged invertebrates |
insect | a class of invertebrates within the arthropod phylum with three pairs of jointed legs |
thorax | An arthropods mid section where its wings and legs are attached |
pupa | the stage where the butter fly is in the cacoon |
nymph | an immature form of an animal |
echinoderm | invertebrates with spiny skin |
endoskeleton | a skelton on the inside |
water vascular system | a system used by echinoderms |