Phylum Echinodermata: Class Concentricycloidea
Mechanism of reproduction in sea lilies is:
parthenogenesis
asexual
sexual
unknown
unknown
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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
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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