Phylum Echinodermata: Class Concentricycloidea
Sea lilies lack the:
disk
tubes
arms
stalk
arms
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Swimming larval stages in sea lilies are:A. absent
B. present
C. naked
D. hidden
Size of preserved xyloplax medusa is nearly:
A. 2 cm
B. 2 mm
C. 3 mm
D. 5 mm
Mechanism of reproduction in sea lilies is:
A. parthenogenesis
B. asexual
C. sexual
D. unknown
Sea daisies that have been recently discovered are included in class
A. crinoidea
B. concentricycloidea
C. Holothuroidea
D. asteroidea
Number of brood pouches that hold embryo during development is:
A. 2 pairs
B. 3 pairs
C. 5 pairs
D. 1 pair
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