What makes up the endoskeleton of echinoderms? madreporite pedicellariae ossicle
ID: 262929 • Letter: W
Question
What makes up the endoskeleton of echinoderms?
madreporite
pedicellariae
ossicles
dermal branchiae
2
What is the name of the small, jawed appendages on the skin of echinoderms?
dermal branchiae
ostia
tube feet
pedicellariae
3
Metamorphosis in class Asteroidea involves a change from a _____ larvae to a ______ adult.
bilateral, radial
radial, bilateral
radial, radial
bilateral, bilateral
4
What is the function of parapodia?
reprodcution
respiration
movement
b and c
5
Where do most amphibians lay eggs?
trees
buried in mounds
water
all of the above
A.madreporite
B.pedicellariae
C.ossicles
D.dermal branchiae
Explanation / Answer
Endoskeleton in echinoderms are made up of interlocking plates composed of calcium carbonate. Ossicles are embedded in the dermis of the body wall (plates) and provide the echinoderms with protection and rigidity.
Pedicellariae are spines modified to form pincer like structures that are used as defence to thwart predators.
Madreporite is the perforated plate in the echinoderms which helps it control entry of sea water into the vascular system.
It is used to absorb oxygen from water.
Parapodia are a pair of fleshy protrusions which bear many bristles known as chaetae and involved in locomotion, respiration and sensation.
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