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What are probably the oldest micro-fossils so far recorded were detected in the Early
Precambrian sediments of Swaziland and have been identified as unicellular organisms …

It is, to say the least, very unusual to find in a circumscribed group of plants a structure
exhibiting a considerable degree of specialization for which, in the present state of our …

The objects of the series Modern Biology is to introduce students and" all interested readers"
to the concepts unifying the various fields of biology. Reference is made in one volume to …

THE that organs they attracted of vegetative the reproduction attention of in observers
Metzgeria at are a so conspicuous early date. that they attracted the attention of observers at …

Mycotrophism occurs in two ericaceous subfamilies, the Monotropoideae and the
Pyroloideae. However, three aspects of the evolution of these subfamilies remain equivocal; …

The protozoa are an eclectic assemblage of organisms encompassing a wide range of
single-celled and multiple-celled colonial organisms lacking tissue organiza tion, but …

THE hard and fast line between Earthworms and Freshwater worms, as indicated by
Claparede's terms1" Terricolae" and" Limicoke/'is gradually becoming less distinct; and as …

Progress in the field of ultrastructure of the lower Metazoa over the last 3 decades, new data
from RNA (l6S, 18S, 28S rRNA) sequence analysis, and sequence analysis of other …

Summary Heterokonta, Haptophyta and Cryptista are grouped together as the kingdom
Chromista. As Heterokonta are considerably more diverse than the other two taxa, they have …