To regulate something always requires two opposing factors. You cannot regulate by a single factor. To give an example, the traffic in the streets could not be controlled by a green light or a red light alone. It needs a green light and a red light as well. The ratio between retine and promine determines whether there is any motion, any growth, or not. Two different inclinations have to be there in readiness to make the cells proliferate.

Research is not a systematic occupation but an intuitive artistic vocation.

This oxidation of hydrogen in stages seems to be one of the basic principles of biological oxidation.

The source of this energy is the sun's radiation.

Life is water, dancing to the tune of solids.

Water is life's matter and matrix, mother and medium. There is no life without water.

We are all but recent leaves on the same old tree of life and if this life has adapted itself to new functions and conditions, it uses the same old basic principles over and over again. There is no real difference between the grass and the man who mows it.