These Odd Little Echinoderms Were Formerly Considered a Class of Their

question 46

Short Answer

These odd little echinoderms were formerly considered a class of their own.They possess tube feet distributed around the periphery of their disclike body and belong to the group ___________.

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Definitions:

Southern Hemisphere

The half of Earth that lies south of the equator.

Rainshadow

A dry area on the leeward side of a mountainous area, where precipitation is significantly reduced due to the blocking of moist air and precipitation by the mountains.

Subtropics

Regions of the Earth immediately adjacent to the tropics, characterized by hot, often humid summers and mild to warm winters.

Loess

An essentially unconsolidated sediment consisting predominantly of silt, interpreted to be windblown dust, commonly of glacial origin.