Gene expression is central to the genotype-phenotype relationship in all organisms, and it is
an important component of the genetic basis for evolutionary change in diverse aspects of …

The notochord is the defining structure of the chordates, and has essential roles in
vertebrate development. It serves as a source of midline signals that pattern surrounding …

The world's most revered and eloquent interpreter of evolutionary ideas offers here a work of
explanatory force unprecedented in our time--a landmark publication, both for its historical …

The AT-hook is a small DNA-binding protein motif which was first described in the high
mobility group non-histone chromosomal protein HMG-I (Y). Since its discovery, this motif …

五億三千萬年前雲南澄江動物化石群是研究寒武紀大爆發獨一無二的科學窗口.
一九八四年以來, 先後找到了**兩萬塊化石標本, 爲遠古生物探密提供了依據 …

The tunicates, or urochordates, constitute a large group of marine animals whose recent
common ancestry with vertebrates is reflected in the tadpole-like larvae of most tunicates …

Direct development is the assumption of the adult morphology without progression through
an intervening, morphologically distinct, free‐living larval phase. We discuss the ecological …

Tunicata, a diverse clade of approximately 3000 described species of marine, filter-feeding
chordates, is of great interest to researchers because tunicates are the closest living …

The 'origin of larvae'has been widely discussed over the years, almost invariably with the
tacit understanding that larvae are secondary specializations of early stages in a …

Thanks to their transparent and rapidly develo** mosaic embryos, ascidians (or sea
squirts) have been a model system for embryological studies for over a century. Recently …