Variable species


  • Chambers's Twentieth Century Dictionary
    • Variable species any species with marked rate of variability
    • ***


Chambers's Twentieth Century Dictionary
Fr.,—L. variabilis.


In literature:

Why should the degree of sterility be innately variable in the individuals of the same species?
"On the Origin of Species" by Charles Darwin
Since the appearance of the first edition of "The Origin of Species" fluctuating variability has been thoroughly studied by Quetelet.
"Darwin and Modern Science" by A.C. Seward and Others
The difficulty in distinguishing variable species is largely due to the varieties mocking, as it were, other species of the same genus.
"On the Origin of Species" by Charles Darwin
Don't forget me, if you ever stumble on cases of the same species being MORE or LESS variable in different countries.
"More Letters of Charles Darwin" by Charles Darwin
The variability of certain genera or groups of species strikes me as a very odd fact.
"More Letters of Charles Darwin Volume II" by Charles Darwin
Secondary sexual characters are highly variable, and such characters differ much in the species of the same group.
"On the Origin of Species by Means of Natural Selection" by Charles Darwin
A species may be highly variable, but distinct races will not be formed, if from any cause selection be not applied.
"The Variation of Animals and Plants Under Domestication, Volume II (of 2)" by Charles Darwin
This is quite a variable species in color and size, as well as manner of growth.
"The Mushroom, Edible and Otherwise" by M. E. Hard
A very variable species in many particulars.
"The North American Slime-Moulds" by Thomas H. (Thomas Huston) MacBride
The species we are now considering is also very variable both in its ground colour and the markings of the wings.
"Butterflies and Moths" by William S. Furneaux
Many of the species are very variable and have been differentiated into races or varieties.
"Encyclopaedia Britannica, 11th Edition, Volume 3, Slice 5" by Various
Granting individual variability, then, how do species arise in nature?
"Charles Darwin" by Grant Allen
Table 13 also shows the variability in relative abundance of different species among areas that have the same general kind of habitat.
"Fish Populations, Following a Drought, in the Neosho and Marais des Cygnes Rivers of Kansas" by James Everett Deacon
Courage and timidity are extremely variable qualities in the individuals of the same species, as is plainly seen in our dogs.
"The Descent of Man and Selection in Relation to Sex, Vol. I (1st edition)" by Charles Darwin
COURAGE, variability of, in the same species, i.
"The Descent of Man and Selection in Relation to Sex" by Charles Darwin
The size of the tympanum relative to that of the eye is highly variable within samples of a given species.
"Neotropical Hylid Frogs, Genus Smilisca" by William E. Duellman
Bill variable; toes always long, webbed (lobed) in only one species; wings short and rounded; tail short.
"Color Key to North American Birds" by Frank M. Chapman
Another complicating factor is the variability of bacula evident in some species even in the small samples available.
"The Baculum in Microtine Rodents" by Sydney Anderson
A variable and elegant species.
"The Manual of the Botany of the Northern United States" by Asa Gray
The variable character of the third upper molar as between species suggests that this tooth is presently undergoing active evolution.
"Evolution and Classification of the Pocket Gophers of the Subfamily Geomyinae" by Robert J. Russell

In science:

Thus, we see that model II corresponds to model I with a specific choice of the function f (~x), with the map of the complex variable z to the inverse of the strength of the potential 2πa and m2 to −E .
Hopping between Random Locations: Spectrum and Instanton
It is a random variable since it depends on the specific choice of the sequences.
High precision simulations of the longest common subsequence problem
This specification differs from model to model and since various models are considered here, we don’t wish to be more explicit about these variables at the present level.
Random walks in random environment on trees and multiplicative chaos
These numbers will be random variables with some specific dependence properties that will be defined later.
Random walks in random environment on trees and multiplicative chaos
Except where otherwise specified, all random variables are assumed to be defined on some background probability space (Ω, F , P), and E denotes expectation with respect to P.
Poisson-Kingman partitions
Specifically, a set of linear constraints C on K variables is fixed.
Linear Phase Transition in Random Linear Constraint Satisfaction Problem
However, most of the paper is not specific to quantum tunnelling and its results may be applied to any problem with sums of lognormal random variables.
Broad distribution effects in sums of lognormal random variables
This specification is a choice of gauge, without which one can not determine the evolution of the physical variables (hij , Kij ).
Close encounters of black holes
The main question is: what variables are under the macroscopic control? Here the macroscopic variables are represented as formal elements of the construction, and the arbitrariness is removed only at solving specific problems.
Geometry of irreversibility: The film of nonequilibrium states
The specific choice of variables is one of the most characteristic aspects of loop quantum gravity, and the one that gave it its name.
On the structure of the space of generalized connections
Specifically, z consists of the variables bij with i < j , so ℓ = k(k − 1)/2.
The Chromatic Number of Random Regular Graphs
Note here that this is specific to the interaction under consideration ; in general the solutions of SD[V] is not determined by their restriction to one variable.
Combinatorial aspects of matrix models
However, the most natural specification higher than Molloy’s lower bound of of the random model for the two problems involves applying constraints on both variables and their negations.
Spines of Random Constraint Satisfaction Problems: Definition and Connection with Computational Complexity
The finite size scaling variable that one gets from the specific heat is of the form (T − Tc (g ))N φt with φt = 1.
Unzipping an adsorbed polymer in a dirty or random environment
Next, let us think of linear transformations of variables, ϕ = λ ˜ϕ and ˜t = α(t − t0 ) where t0 is an arbitrary integration constant while λ and α are constants to be specified.
Simple Models for the Distribution of Dark Matter