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TERMGROUPDEFINITION
WATER VASCULAR SYSTEMNPANIMALSPronunciation:

Etymology:

The water vascular system is a series of internal tubes through which water circulates and provides hydraulic force for movement. The water vascular system connects to the outside by a pore called a madreporite.
WEIGHTED CHARACTERNPSYSTEMATICSPronunciation: Weighted is a common English word.

Etymology: Weight comes from the Old English word, wegan, which means to find the weight.

A weighted character refers to the condition when particular characters are considered more important (that is less likely to change). For example, a developmental character might be much less likely to occur and still produce a viable organism than a structural character. MacClade can weight to characters from 1 to 9.
WHIPLASH FLAGELLUM (WHIPLASH FLAGELLA)NANIMALS, PLANTS, PROTISTS, FUNGIPronunciation:

Etymology:

(1) A whiplash flagellum is a eukaryotic 9+2 flagellum with few or no flagellar hairs or scales. These may be directed anteriorly or posteriorly.

(2) A whiplash flagellum is free of hair-like mastigonemes and usually is trailing or posteriorly-directed.
WHORLED LEAVESNPPLANTSPronunciation:

Etymology:

When plants have more than two leaves per node, they are said to have whorled leaves.
WINGNANIMALSPronunciation:

Etymology:

Modified epidermal extentions of insects and modified forelimbs in vertebrates (pterodactyls, bats, and birds).
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