Animal Quote by Ray Lankester

The morphological characteristics of plant and animal species form the chief subject of the descriptive natural sciences and are the criteria for their classification.…

— Karl Landsteiner

It was always understood that plants and animals, though completely contrasted in their higher representatives, approached each other very closely in their lower and…

— Asa Gray

But it was soon ascertained that this quaternary matter of the animal body was chemically the same in the plant, was elaborated there, and…

— Asa Gray

The fundamental problem in the origin of species is not the origin of differences in appearance, since these arise at the level of the…

— David Lack

Many years ago it was taught that plants and animals were composed of different materials: plants, of a chemical substance of three elements,- carbon,…

— Asa Gray

Evolutionary biologists are not content merely to explain how variation occurs within limits, however. They aspire to answer a much broader question-which is how…

— Phillip E. Johnson

As in all of biology, comparative studies showing differences among species are often helpful for a better understanding of the basic mechanisms; with all…

— John Tyler Bonner

“As the species of the same genus usually have, though by no means invariably, much similarity in habits and constitution, and always in structure,…

— Charles Darwin

Embryology reveals surprising similarities between early embryos of seemingly quite different animals. And it also shows that some structures that may look very different…

— Alice Roberts

“It has already been stated that various parts in the same individual, which are exactly alike during an early embryonic period, become widely different…

— Charles Darwin

“There are several types of comparative analysis for garnering evidence for an evolutionary adaptation: structural or behavioral resemblance in different phyletic lines owing to…

— Scott Atran

The existence of common features in different forms of life indicates some relationship between the different organisms, and according to the concept of evolution,…

— Hans Adolf Krebs