Animal Quote by Ivan Pavlov

To describe an animal as a physico-chemical system of extreme complexityis no doubt perfectly correct, except that it misses out on the animalness of…

— E. F. Schumacher

Each organism's environment, for the most part, consists of other organisms.

— Kevin Kelly

All organs of an animal form a single system, the parts of which hang together, and act and re-act upon one another; and no…

— Georges Cuvier

Ecology, like genetics, is not about equilibrium states. It is about change, change and change. Nothing stays the same forever.

— Matt Ridley

In a broad systems sense, an organism's environment is indistinguishable from the organism itself.

— Kevin Kelly

Now, a living organism is nothing but a wonderful machine endowed with the most marvellous properties and set going by means of the most…

— Claude Bernard

A cell of a higher organism contains a thousand different substances, arranged in a complex system. This great organized system was not discovered by…

— Herbert Spencer Jennings

If we recognise that every ecosystem can also be viewed as a food web, we can think of it as a circular, interlacing nexus…

— Murray Bookchin

The following general definition of an animal: a system of different organic molecules that have combined with one another, under the impulsion of a…

— Denis Diderot

The organism cannot be regarded as simply the passive object of autonomous internal and external forces; it is also the subject of its own…

— Richard Levins

“It is the elegance of nature that creates even the appearance of simplicity... It is not respectable to say that an organism is designed…

— Marilynne Robinson

Living systems are never in equilibrium. They are inherently unstable. They may seem stable, but they’re not. Everything is moving and changing. In a…

— Michael Crichton