Now showing items 31-40 of 75
A mathematical foundation for the analysis of cladistic character compatibility
(Elsevier, 1976)
Using formal algebraic definitions of "cladistic character" and "character compatibility", the concept of "binary factors of a cladistic character" is formalized and used to describe and justify an algorithm for checking ...
Genome amplification and gene expression in the ciliate macronucleus
(Kluwer Academic Publishers-Plenum Publishers; Plenum Publishing Corporation ; Springer Science+Business Media, 1972-06)
The focus of this review is on the micronucleus and macronucleus in the ciliated protozoa and the organization and function of the DNA molecules within them. We present (1) some of the structural and functional differences ...
Intersyngenic variations in the esterases of axenic stocks of Paramecium aurelia
(Kluwer Academic Publishers-Plenum Publishers; Plenum Publishing Corporation ; Springer Science+Business Media, 1971-04)
The esterase isozymes were surveyed in axenic stocks of syngens 1, 2, 4, 5, 6, and 8 of Paramecium aurelia by starch gel electrophoresis. In paramecia there appear to be four types of esterases which are clearer in axenic ...
Intersyngenic variations in the esterases and acid phosphatases of Tetrahymena pyriformis
(Kluwer Academic Publishers-Plenum Publishers; Plenum Publishing Corporation ; Springer Science+Business Media, 1971-04)
The esterase and acid phosphatase isozymes were surveyed in strains of syngens 2–12 under conditions found to be optimal for syngen 1. Both intersyngenic and intrasyngenic variations were found. Comparisons of the esterases ...
Development of Dentalium following removal of D-quadrant blastomeres at successive cleavage stages
(Springer-Verlag, 1979-12)
Each primary micromere and macromere of the D-quadrant of Dentalium was deleted, through the mesentoblast stage, to investigate the way in which the polar lobe cytoplasm exerts its influence on development.-D and -1D embryos ...
A model describing photosynthesis in terms of gas diffusion and enzyme kinetics
(Springer-Verlag, 1971-09)
A model predicting net photosynthesis of individual plant leaves for a variety of environmental conditions has been developed. It is based on an electrical analogue describing gas diffusion from the free atmosphere to the ...
How to determine the compatibility of undirected character state trees
(Elsevier, 1979-10)
Methods for cladistic character compatibility analysis have required a priori estimates of the direction of evolutionary trends among the states of a character, in order to ensure consistency. Results are presented here ...
Roles of metabolic level and temperature regulation in the adjustment of Western plumed pigeons (Lophophaps ferruginea) to desert conditions
(Elsevier, 1973-02-01)
1. 1. Standard metabolic rate of western plumed pigeons (Lophophaps ferruginea) averages 0[middle dot]88 ml O2 (g hr)-1 during summer. This rate and the rate of evaporative water loss by these birds at 25[deg]C are well ...
Effects of olfactory experience on aggression in Mus musculus and Peromyscus maniculatus
(Elsevier, 1972-04)
Groups of Mus musculus and Peromyscus maniculatus were raised from birth either in the presence or absence of odors of the other species. In later tests of interspecific aggression it was found that individuals raised in ...
Phylogenetic relationships in the lizard family Pygopodidae: an evaluation of theory, methods and data
(University of Michigan Museum of Zoology, 1976)