Unit 13 : Vocab Crossword

an invertebrate with a soft, unsegmented body; most are protected by a hard outer shell
system in which blood is not always contained within a network of blood vessels
organs that exchange oxygen and carbon dioxide with water
member of a group of mollusks that includes snails and slugs; a mollusk with a single shell or no shell
plant-eating animal
a consumer that eats only animals
a flexible ribbon of tiny teeth in mollusks
a mollusk that has two shells held together by hinges and strong muscles
organism that obtains energy by eating both plants and animals
an ocean-dwelling mollusk whose foot is adapted as tentacles that surround its mouth
invertebrate having jointed limbs and a segmented body with an exoskeleton made of chitin
external skeleton; tough external covering that protects and supports the body of many invertebrates
the process of shedding an outgrown exoskeleton
an appendage attached to the head that contains sense organs
an arthropod that has two or three body sections, five or more pairs of legs, and two pairs of antennae; lives in the water
the transformation of a larva into an adult that occurs in some animals
an arthropod with two body sections, four pairs of legs, and no antennae (includes spiders, scorpions, mites, ticks)
the hind/back section of an arthropods body that contains its reproductive organs and part of its digestive tract
an arthropod with three body sections, six legs, one pair of antennae, and usually one or two pairs of wings
the middle part of an insect's body that bears the wings and legs
The transformation of a larva into an adult that looks very different, and often functions very differently in its environment, than the larva.
stage of complete metamorphosis in which an insect changes from larva to adult
A type of metamorphosis in which an egg hatches into a nymph that resembles an adult, and which has no distinctly different larval stage
a stage of gradual metamorphosis that usually resembles the adult insect
the branch of biology concerned with the relations between organisms and their environment
a series of steps in which organisms transfer energy by eating and being eaten
any animal that carries pollen from one plant to another of the same species, enabling plants to reproduce
a chemical used to kill pests (as rodents or insects)
use of natural predators, pathogens, or competitors to regulate pest populations
A radially symmetrical invertebrate that lives on the ocean floor and has a spiny internal skeleton; member of a group of marine invertebrates that includes sea urchins and sea stars
internal skeleton or supporting framework in an animal
system of fluid-filled tubes used by echinoderms in locomotion and feeding and respiration
extensions of echinoderms water vascular system that stick out from the body and function in movement and obtaining food
echinoderms characterized by five arms extending from a central disk (also called a star fish)