Phylum Echinodermata: Class Concentricycloidea
Sea daisies that have been recently discovered are included in class
crinoidea
concentricycloidea
Holothuroidea
asteroidea
concentricycloidea
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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
Sea lilies lack the:
A. disk
B. tubes
C. arms
D. stalk
Mechanism of reproduction in sea lilies is:
A. parthenogenesis
B. asexual
C. sexual
D. unknown
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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