<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/schema/zthes-1.0.dtd">  <Zthes><term><termId>23057</termId><termName>RITMOS BIOLOGICOS</termName><termType>PT</termType><termLanguage>es-ES</termLanguage><termVocabulary>TESAURO DE MATERIAS DE SERBIULA</termVocabulary>	<termStatus>active</termStatus>	<termApproval>approved</termApproval>	<termSortkey>RITMOS BIOLOGICOS</termSortkey><termCreatedDate>RITMOS BIOLOGICOS</termCreatedDate><relation><relationType>UF</relationType><termId>23063</termId><termName>Ciclos en biología</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>23064</termId><termName>Relojes biológicos</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>23062</termId><termName>Biología--Periodicidad</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>11448</termId><termName>CRONOBIOLOGIA</termName><termType>PT</termType></relation><relation><relationType>BT</relationType><termId>5829</termId><termName>FENOMENOS CICLICOS</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>23058</termId><termName>CICLO CELULAR</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>10524</termId><termName>CICLO SEXUAL</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>23059</termId><termName>ENFERMEDADES PERIODICAS</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>1025</termId><termName>FENOLOGIA</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>23060</termId><termName>FOTOPERIODICIDAD</termName><termType>PT</termType></relation></term>  </Zthes>