5 Written Questions

1. fluid-filled body cavity completely surrounded by mesoderm
2. organism that is permanently attached to a surface
3. stage of incomplete metamorphosis where an insect hatching from an egg has the same general appearance as the adult insect but is smaller and sexually immature
4. stage of insect metamorphosis where tissues and organs are broken down and replaced by adult tissues; larva emerges from pupa as a mature adult
5. a cnidarian body form that is umbrella-shaped with tentacles that hang down

5 Matching Questions

1. tube foot
2. polyp
3. radial symmerty
4. mandible
5. ray

1. a in most arthropods. mouthparts adapted for holding, chewing, sucking, or biting various foods
2. b in echinoderms, hollow, thin-walled tubes that end in a suction cup; part of the water vascular system, they also aid in locomotion, gas exchange and excretion
3. c long tapered arms of some echinoderms that are covered with short, rounded spines
4. d a cnidarian body form that is tube-shaped with a mouth surrounded by tentacles
5. e an animal's body plan that can be divided along any plane, through a central axis, into roughly equal halves

5 Multiple Choice Questions

1. head end of bilateral animals where sensory organs are often located
   1. anterior
   2. coelom
   3. ventral
   4. posterior
2. upper surface of bilaterally symmetric animals
   1. dorsal
   2. larva
   3. ray
   4. coelom
3. tiny bristles that help segmented worms move by anchoring their bodies in the soil so each segment can move the animal along
   1. sessile
   2. setae
   3. ray
   4. mantle
4. tail end of bilaterally symmetric animals
   1. coelom
   2. anterior
   3. posterior
   4. molting
5. organs that remove metabolic wastes from an animal's body
   1. sessile
   2. nephridia
   3. spiracle
   4. nymph

5 True/False Question

1. symmetry → a term that describes the arrangement of body structures
   

   True        False

2. filter feeding → in arthropods, the periodic shedding of an old exoskeleton
   

   True        False

3. molting → in arthropods, the periodic shedding of an old exoskeleton
   

   True        False

4. exoskeleton → fluid-filled body cavity completely surrounded by mesoderm
   

   True        False

5. ventral → lower surface of bilaterally symmetric animals
   

   True        False