We will now proceed to show the fundamental cause of this struggle, and to prove that it is ever acting over the whole field of nature, and that no single species of animal or plant can possibly escape from it.
The genus Erpetoichthys contains a single species, Erpetoichthys calabaricus,[163] found also in the Senegal and Congo.
Northward, in all the streams from the Potomac to the Oswego, and westward to the Des Moines and the Arkansas, occurs a single species of this type, Notropis whipplei, varying eastward into Notropis analostanus.
With our present knowledge, the common view that all have descended from a single species is, perhaps, the most probable.
From the fertility of the most distinct breeds[111] when crossed, naturalists have generally looked at all the breeds as having descended from a single species.
I concluded that its varieties formed at least four species, these being in external appearance extremely distinct; but ultimately the many intermediate forms compelled me to unite all into a single species.
So also, by adding a single species, might the west coast of equatorial Africa.
Not a single species, excepting a few which are also widely distributed over other parts of the world, is known to be common to the east and west coasts of the two Americas.
The genus is represented by a single species of western North America.
In order to understand the difficulties which it presents, we must first ascertain what nearly allied forms authors designate--sometimes as distinct species of the genus Linum, and sometimes as varieties of a single species.
The nature of the indigenous flora has so much to do with it, that the Europeans, established in these countries for a hundred years, have only cultivated a single species, the Tetragonia, an insignificant green vegetable.
Defn: A genus of Australian gallinaceous birds including but a single species (Leipoa ocellata), about the size of a turkey.
Defn: The theory or doctrine that the human races have a common origin, or constitute a single species.
Defn: A genus of leguminous plants containing but a single species, the H.
With domestic dogs the question is simply whether the whole amount of difference has been produced since man domesticated a single species; or whether part of the difference arises in the state of nature.
Probably the size of foolscap is the most convenient, each sheet being confined to a single species.
As we advance northward they decrease rapidly, so that the central districts of Sweden possess only a single species, the Phallus impudicus, and even this solitary representative of the family is very scarce.
They appertain in consequence to a single species, and the Gymnosporangium ceased to be an independent species, and must be considered as synonymous with the first generation of Roestelia.
This genus, like the last, is represented by a single species, and its characters, therefore, are detailed below.
The Sub-family has been divided into three genera, Avahis with one species; Propithecus, with three species, and Indris with a single species.
This genus is monotypic, containing but a single species, whose characters include necessarily those of the genus.
Moreover, of the five tribes into which the large family of Cicindelidae can be sub-divided, only two range to Europe, and one of them is represented by only a single species on our continent.
Scotland alone cannot be classed as a separate province, since it does not contain a single species peculiar to itself.
Not a single species of land or freshwater mollusc can be quoted as having migrated to Europe from Siberia in recent geological times.
That is to say, a single species only, during summer, namely, the Yellow Bunting.
The Linnet, with its close allies the Twite and the Lesser Redpole, are familiar winter visitors to the fields, wandering about in flocks, each usually composed of a single species.
English authorities who have examined the material agree that the forms described constitute but a single species, and Lister makes them identical with D.
Are they simply phases of a single species, or are they in style and in structure sufficiently constant in their admitted variety, to claim specific rank and separate description?
Otherwise it resembles the Gazelles; there is but a single species, A.
The genus Thylacinus contains but a single species, which is now limited to Tasmania, and is generally known as the Tasmanian Wolf.
There is but a single species, which is a small creature of 7 inches in total length, of which the tail measures 4 inches.
The genus Antechinomys has but a single species, which is a native of Queensland and New South Wales.
The above list will hopefully provide you with a few useful examples demonstrating the appropriate usage of "single species" in a variety of sentences. We hope that you will now be able to make sentences using this group of words.
