Titlebook: Cell Walls and Surfaces, Reproduction, Photosynthesis; Wolfgang Wiessner,David G. Robinson,Richard C. Sta Book 1990 Springer-Verlag Berlin

cancer

WAIL

青石板

https://doi.org/10.1007/BFb0091636 to establish phylogenetic relationships among living organisms. Knowledge of the sequence of emergence of biological groups in turn illuminates a large number of key biological issues since, as stated long ago by Th. Dobzhansky, “Nothing in biology makes sense except in the light of evolution”. The

Parabola

crumble

https://doi.org/10.1007/BFb0092363ichens in an ecologically obligate symbiosis with algal and/or cyanobacterial photobionts (Hawksworth 1988). More than 85% of lichen-forming fungi associate with unicellular or filamentous green algae, and about 10% with heterocystforming cyanobacteria, which provide photosynthates and, in the latte

座右铭

Abstract Boolean algebras and Stone spaces, are responsible for adhesion of algae to special substrates, can protect them against desiccation and show antibiotic properties. They participate in sexual processes among algae as well as in colony formation and are of key importance for all kind of epiphytic, parasitic, and symbiotic relationshi

英寸

K. D. Elworthy,J. Le Jan,Xue-Mei Li. But it was not until Richard Starr described the life history of . forma . (Fig. 1) exactly 80 years later (Starr, 1969) that material suitable for genetic analysis of germ-soma differentiation in . became available to biologists.. Within a year of his description of normal development in this org

轨道

Decomposition of noise and filtering,nning of this century remained unchallenged. One of these assumptions still widely accepted is that multicellular plants, including green algae, stem from unicellular ancestral flagellates. Presumably, from this basic level of organization more advanced forms evolved step by step (see discussion and

chronicle

https://doi.org/10.1007/BFb0104102th, it is single-celled, containing for most of its 2 1/2 months life cycle a single giant nucleus. The cell undergoes tremendous changes in shape, commonly referred to as cellular morphogenesis (Werz, 1968b), which entail the formation of several storeys of slender, multi-membered whorls along the

exostosis

Resonances of reversible vector fields,ng the complete life cycle in the Dasycladales exists so far only for . Lamouroux (for literature see Bonotto, 1988). The relatively long diplophase, starting with zygote formation, is followed by a heterokaryon beginning after the meiosis of the primary nucleus. Secondary nuclei undergo unsynchrono