Biology 1100 Test Questions with Correct
Answers
all animals with backbones
invertebrates
marine invertebrates; hard, flat internal skeletons; water vascular systems; sea stars;,
brittle stars, and sea urchins
echinoderms
flat, bony plates; form the skeleton of an echinoderm
ossicles
tube-shaped structures on the ventral side of each arm of a sea star; used for locomotion
and food gathering
tube feet
button-shaped pore on the dorsal of sea star; where water enters the water vascular
system
madreporite
sea star's first stomach; can be turned inside out to partially digest food outside the sea
star's body
cardiac
long cylindrical echinoderm; no arms; burrows into the mud and filters food out of the
sediment
sea cucumber
, echinoderm with a rounded upper body covered with fused ossicles nd long, sharp
spines; flat bottom
sea urchin
Aquatic invertebrates with porous bodies and skeletons made of collagen or mineral
fibers are ______
sponges
Water is pulled into the sponge through _________ pores in the outer cell layer, and
water exits the sponge through a single large pore at the top of the sponge called the
_____ pore
incurrent.....excurrent
________ are fibers that make up the skeleton of a sponge.
Spicules
__________ cells are the only class of cells in sponges, and they differentiate into other
cells specialized for specific functions.
Epithelial
________ are specialized cells that disperse nutrients to and collect waste from other
cells of a sponge.
Amoebocytes
________ cells that line the central cavity of a sponge trap and digest food particles.
Collar
Answers
all animals with backbones
invertebrates
marine invertebrates; hard, flat internal skeletons; water vascular systems; sea stars;,
brittle stars, and sea urchins
echinoderms
flat, bony plates; form the skeleton of an echinoderm
ossicles
tube-shaped structures on the ventral side of each arm of a sea star; used for locomotion
and food gathering
tube feet
button-shaped pore on the dorsal of sea star; where water enters the water vascular
system
madreporite
sea star's first stomach; can be turned inside out to partially digest food outside the sea
star's body
cardiac
long cylindrical echinoderm; no arms; burrows into the mud and filters food out of the
sediment
sea cucumber
, echinoderm with a rounded upper body covered with fused ossicles nd long, sharp
spines; flat bottom
sea urchin
Aquatic invertebrates with porous bodies and skeletons made of collagen or mineral
fibers are ______
sponges
Water is pulled into the sponge through _________ pores in the outer cell layer, and
water exits the sponge through a single large pore at the top of the sponge called the
_____ pore
incurrent.....excurrent
________ are fibers that make up the skeleton of a sponge.
Spicules
__________ cells are the only class of cells in sponges, and they differentiate into other
cells specialized for specific functions.
Epithelial
________ are specialized cells that disperse nutrients to and collect waste from other
cells of a sponge.
Amoebocytes
________ cells that line the central cavity of a sponge trap and digest food particles.
Collar
