In some hydroids the founder-polyp, developed from a planula after fixation, throws out numerous outgrowths from the base to form the hydrorhiza; these outgrowths may be radially arranged so as to form by contact or coalescence a flat plate. [Please select]
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State whether the animal is bilaterally symmetrical, radially symmetrical, or without symmetry. [Please select]
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#Polyp#, any radially symmetrical animal, but usually an individual in a connected colony. [Please select]
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The plane of cleavage is parallel to the grain, either radially or tangentially. [Please select]
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The galleries extend inward radially, side by side, in countless numbers, to the depth of about one-half inch. [Please select]
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The other elements of the wood shrink radially and tangentially, but almost none lengthwise or vertically as applied to the tree. [Please select]
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Some of the blocks are cut radially and some tangentially, as indicated in the figure. [Please select]
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