Biology Chapter 23 Crossword

Three-stranded protein, unique to animals, combines to form strong flexible fibres
genes that control early development animals
genes that define the head-to-tail pattern of development in animal embryos
animal with an internal segmented backbone
animals without a backbone
group of animals defined by structural and functional characteristics that are different from every other phylum
body plan of some organisms in which the body can be divided equally along only one plane
arrangement of body parts in a circle around a central axis
animal development in which the animals mouth develops before the anus
animal development in which the animals anus develops before the mouth
unable to move from a fixed point
animals that eats by straining particles from water
tubed-shaped body form of a cnidarian in which the mouth and tentacles face upward
jellylike material that separates the two tissue layers of a cnidarian
umbrella-shaped body form of a cnidarian in which the mouth and tentacles are on the underside
capsule containing a thin, coiled tubule with a poisonous barb at one end
saclike digestive space
digestive system that has two openings, mouth and an anus, that are at opposite ends of a continuous tube
filelike feeding organ found in mollusks
open space between cells in animal tissue
repeated sections of an annelids long body that contains the same set of structur, head and tail not included
fluid-filled space that is completely covered by muscle
in plants, a waxy layer that holds in moisture; insects, a tough exoskeleton made of non-living material
small bone, especially one of the three found in the middle ear of mammals
system of water filled canals that extend down each arm of a echinoderm, such as sea star